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46 C.F.R. Subpart 151.05—Summary of Minimum Requirements for Specific Cargoes

Title 46 - Shipping

Title 46: Shipping
PART 151—BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES

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Subpart 151.05—Summary of Minimum Requirements for Specific Cargoes

§ 151.05-1   Explanation of column headings in Table 151.05.

(a) Cargo identification/name. This column identifies cargoes by name. Words in italics are not part of the cargo name but may be used in addition to the cargo name. When one entry references another entry by use of the word “see” and both names are in roman type, either name may be used as the cargo name (e.g., “Diethyl either see Ethyl ether”). However, the referenced entry is preferred.

(b) Cargo identification/pressure. This column identifies cargo in terms of pressure within the tank. Terms used are:

(1) Pressurized. Cargo carried at a pressure in excess of 10 pounds per square inch gauge as measured at the top of the tank (i.e., exclusive of static head).

(2) Atmospheric pressure. Cargo carried at not more than 10 pounds per square inch gauge, exclusive of static head.

(c) Cargo identification/temperature. This column identifies the cargo by the temperature of the cargo during transit.

(1) Ambient temperature. Cargo which is carried at naturally occurring temperatures.

(2) Low temperature. Cargo carried below ambient temperatures when the product temperature is below 0 °F.

(3) Elevated temperature. Cargo carried above ambient temperatures.

(d) Hull type. This column refers to the flotation features of the barge. Terms used are explained and defined in Subpart 151.10 of this part.

(e) Cargo segregation/tanks. This column refers to the separation of the cargo from its surroundings. Terms are explained in §151.13–5 and in footnotes to Table 151.05 of this part.

(f) Tanks/type. This column refers to the design requirements for cargo tanks and their placement within the hull of the vessel. Terms are explained in §151.15–1.

(g) Tanks/venting. This column refers to arrangements for preventing excess pressure or vacuum within the cargo tank. Terms used are explained and defined in §151.15–5.

(h) Tanks/gauging devices. This column refers to arrangements provided for determining the amount of cargo present in cargo tanks. Terms used are explained and defined in §151.15–10.

(i) Cargo transfer/piping. This column refers to the classification of piping in accordance with Subchapter F of this chapter as discussed in §151.20–1.

(j) Cargo transfer/control. This column refers to the valving requirements for the cargo piping system. These requirements are defined in §151.20–5.

(k) Environmental control/cargo tanks. This column refers to control of the composition of the environment within cargo tanks. Definitions and detailed requirements are given in §151.25–1.

(l) Environmental control/cargo handling space. This column refers to control of the environment in the cargo handling spaces. Definitions and detailed requirements are found in §151.25–2.

(m) Fire protection. This column specifies whether portable fire extinguishers are required on barges carrying the cargo named. Requirements for cargoes requiring extinguishers are given in Subpart 151.30 of this part.

(n) Special requirements. This column refers to requirements in subparts 151.40, 151.50, 151.55, 151.56, and 151.58 of this part which apply to specific cargoes. The section numbers listed omit the preceding part designation, “151”.

(o) Electrical hazard class—group. This column lists the electrical hazard class and group used for the cargo when determining requirements for electrical equipment under subchapter J (Electrical engineering) of this chapter.

(p) Temperature control installations. This column refers to systems which are used to control the temperature of the cargo. Definitions and requirements which are applicable if such systems are used are given in Subpart 151.40 of this part.

(q) Tank inspection period. This column refers to the maximum period in years between internal cargo tank inspections. Applicable requirements are given in §151.04–5.

[CGFR 70–10, 35 FR 3714, Feb. 25, 1970; 35 FR 6431, Apr. 22, 1970, as amended by CGD 74–275, 40 FR 21958, May 20, 1975; CGD 88–100, 54 FR 40029, Sept. 29, 19895; CGD 96–041, 61 FR 50731, Sept. 27, 1996; USCG 2000–7079, 65 FR 67183, Nov. 8, 2000]

§ 151.05-2   Compliance with requirements for tank barges carrying benzene and benzene containing cargoes, or butyl acrylate cargoes.

A tank barge certificated to carry benzene and benzene containing cargoes or butyl acrylate cargoes must comply with the gauging requirement of Table 151.05 of this part by August 15, 1998. Until that date, a tank barge certificated to carry benzene and benzene containing cargoes must meet either the gauging requirement of Table 151.05 or the restricted or closed gauging requirements in effect on September 29, 1994; and a tank barge certificated to carry butyl acrylate cargoes must meet either the gauging requirements of Table 151.05 or comply with the open, restricted, or closed gauging requirements in effect on September 29, 1994.

[CGD 95–900, 60 FR 34050, June 29, 1995]

Table 151.05 to Subpart 151.05 of Part 151—Summary of Minimum Requirements

 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------                Cargo identification\1\                                                        Tanks                      Cargo transfer        Environmental-------------------------------------------------------             Cargo  ----------------------------------------------------------------        control                                            Electrical                Tank                                                          Hull     segre-                                                                  ----------------------    Fire      Special requirements     hazard      Temp.     internal                                                          type     gation                                      Gauging   Piping                          Cargo    protection    in 46 CFR Part 151     class and   control    inspect.             Cargo name               Pressure   Temp.              tank             Type             Vent     device     class    Control    Cargo     handling   required                              group    install.  period_years                                                                                                                                              tanks      space----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------a.                                          b.      c.        d.     e.     f.....................        g.        h.        i.        j.         k.         l.         m.   n.....................         o.         p.          q.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetaldehyde.......................     Press.    Amb.        II       1NA  Ind. Pressure.........        SR    Restr.        II       P-1      Inert     Vent F        Yes   .55-1(h)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetic acid........................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-73................        I-D         NA           G                                                                     2 i i                                                                                                    .55-1(g)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetic anhydride...................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-73................        I-D         NA           G                                                                     2 i i                                                                                                    .55-1(g)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetone cyanohydrin................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           G                                                                       2 i                                                                                                    .50-70(b).............                                                                                                                                                                              .50-73................                                                                                                                                                                              .50-81................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetonitrile.......................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acrylic acid.......................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-73................                                                                                                                                                                              .50-81................                                                                                                                                                                              .58-1(a)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acrylonitrile......................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .55-1(e)..............        I-D         NA           G                                                                     2 i i                                                                                                    .50-70(a).............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Adiponitrile.......................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV      Open        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Alkylbenzenesulfonic acid (greater      Atmos.   Elev.       III     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-73................        I-B         NA           G than 4%).                                                           2 i i                                                                                                    .58-1(e)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Alkyl(C7-C9) nitrates..............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-81................         NA         NA           G                                                                     2 i i                                                                                                    .50-86................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Allyl alcohol......................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-C         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Allyl chloride.....................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Aluminum sulfate solution..........     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .58-1(e)..............         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Aminoethylethanolamine.............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(b)..............         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ammonia, anhydrous.................     Press.    Amb.        II       1NA  Ind. Pressure.........     SR250    Restr.        II       P-2         NR     Vent F         No   .50-30................        I-D         NA           G                                                                     2 i i                            p.s.i.                                                                  .50-32................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ammonia, anhydrous.................     Atmos.     Low        II       1NA  Ind. Gravity..........        PV    Restr.      II-L       G-2         NR     Vent F         No   .50-30................        I-D       .40-           8                                                                     2 i i                                                                                                    .50-32................               1(b)(1)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ammonium bisulfite solution (70% or     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-73................         NA         NA           G less).                                                                2 i                                                                                                    .56-1(a), (b), (c)....----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ammonium hydroxide (28% or less NH      Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   .56-1(a), (b), (c),           I-D         NA           G 3).                                                                   2 i                                                                                                     (f), (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Aniline............................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Anthracene oil (Coal tar fraction).     Atmos.    Amb.        II     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   No....................        I-D         NA           G                                                 Elev.               2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Argon, liquefied...................     Press.     Low       III       1NA  Ind. Pressure.........        SR    Restr.      II-L       P-1         NR     Vent F         No   .40-1(a)..............         NA   .40-1(a)           G                                                                       2 i                                                                                                    .50-30................                                                                                                                                                                              .50-36................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Benzene............................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .50-60................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Benzene hydrocarbon mixtures            Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .50-60................        I-D         NA           G (containing Acetylenes) (having                                     2 i i                                                                                                    .56-1(b), (d), (f), 10% Benzene or more).                                                                                                                                                         (g),.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Benzene hydrocarbon mixtures            Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .50-60................        I-D         NA           G (having 10% Benzene or more).                                       2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Benzene, Toluene, Xylene mixtures       Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .50-60................        I-D         NA           G (having 10% Benzene or more).                                       2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butadiene..........................     Press.    Amb.        II       1NA  Ind. Pressure.........        SR    Restr.        II       P-2         NR     Vent F        Yes   .50-70(a).............        I-B         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butadiene, Butylene mixtures            Press.    Amb.        II       1NA  Ind. Pressure.........        SR    Restr.        II       P-1         NR     Vent F        Yes   .50-30................        I-B         NA           G (containing Acetylenes).                                            2 i i                                                                                                    .50-70(a).............                                                                                                                                                                              .50-73................                                                                                                                                                                              .56-1(b), (d), (f),                                                                                                                                                                               (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butyl acrylate (all isomers).......     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butylamine (all isomers)...........     Atmos.    Amb.        II     1 i i  Ind. Gravity..........        PV    Closed        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butyl methacrylate.................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butyraldehyde (all isomers)........     Atmos.    Amb.       III       1 i  Integral Gravity......        PV      Open        II       G-1         NR     Vent F        Yes   .55-1(h)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Camphor oil (light)................     Atmos.    Amb.        II     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Carbolic oil.......................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................         NA         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Carbon dioxide, liquefied..........     Press.     Low       III       1NA  Ind. Pressure.........        SR    Restr.       I-L       P-1         NR     Vent F         No   .50-30................         NA       .40-           G                                                                       2 i                                                                                                                                         1(b)(1)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Carbon disulfide...................     Atmos.    Amb.        II       1NA  Ind. Gravity..........        PV    Restr.        II       G-1      Inert     Vent F        Yes   .50-40................        I-A         NA           G                                                                     2 i i                                                                                                    .50-41................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Carbon tetrachloride...............     Atmos.    Amb.       III       1 i  Integral Gravity......        PV      Open        II       G-1         NR     Vent N         No   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cashew nut shell oil (untreated)...     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-2         NR     Vent N        Yes   .50-73................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Caustic potash solution............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR         NR         No   .50-73................         NA         NA           G                                                 Elev.                 2 i                                                                                                    .55-1(j)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Caustic soda solution..............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR         NR         No   .50-73................         NA         NA           G                                                 Elev.                 2 i                                                                                                    .55-1(j)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chlorine...........................     Press.    Amb.         I       1NA  Ind. Pressure.........     SR300  Indirect         I       P-2         NR     Vent F         No   .50-30................         NA         NA           3                                                                     2 i i                            p.s.i.                                                                  .50-31................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chlorobenzene......................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV      Open        II       G-1         NR     Vent N        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chloroform.........................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent F         No   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chlorohydrins (crude)..............     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------o-Chloronitrobenzene...............     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................         NA         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chlorosulfonic acid................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV      Open        II       G-1         NR     Vent N         No   .50-20................        I-B         NA           G                                                                     2 i i                                                                                                    .50-21................                                                                                                                                                                              .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Coal tar naphtha solvent...........     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-73................        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Coal tar pitch (molten)............     Atmos.   Elev.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-73................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Creosote...........................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cresols (all isomers)..............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cresols with less than 5% Phenol, see Cresols (all isomers).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cresols with 5% or more Phenol, see Phenol.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cresylate spent caustic............     Atmos.    Amb.       III     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-73................         NA         NA           G                                                                       2 i                                                                                                    .55-1(b)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cresylic acid, sodium salt solution, see Cresylate spent caustic.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Crotonaldehyde.....................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(h)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cyclohexanone......................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .56-1(a), (b).........        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cyclohexanone, Cyclohexanol mixture     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .56-1(b)..............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cyclohexylamine....................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .56-1(a), (b), (c),           I-D         NA           G                                                                     2 i i                                                                                                     (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cyclopentadiene, Styrene, Benzene       Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent F        Yes   .50-60................        I-D         NA           G mixture.                                                            2 i i                                                                                                    .56-1(b)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------iso-Decyl acrylate.................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-70(a).............         NA         NA           G                                                                       2 i                                                                                                    .50-81(a), (b)........                                                                                                                                                                              .55-1(c)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dichlorobenzene (all isomers)......     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .56-1(a), (b).........        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dichlorodifluoromethane............     Press.    Amb.       III       1NA  Ind. Pressure.........        SR    Restr.        II       P-1         NR         NR         No   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,1-Dichloroethane.................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,2[prime]-Dichloroethyl ether.....     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(f)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dichloromethane....................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   No....................        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,4-Dichlorophenoxy acetic acid,        Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .56-1(a), (b), (c),            NA         NA           G diethanolamine salt solution.                                         2 i                                                                                                     (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,4-Dichlorophenoxyacetic acid,         Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   .56-1(a), (b), (c),            NA         NA           G dimethylamine salt solution.                    Elev.                 2 i                                                                                                     (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,4-Dichlorophenoxyacetic acid,         Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .56-1(a), (b), (c),            NA         NA           G triisopropanolamine salt solution.                                    2 i                                                                                                     (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,1-Dichloropropane................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,2-Dichloropropane................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,3-Dichloropropane................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,3-Dichloropropene................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dichloropropene, Dichloropropane        Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G mixtures.                                                           2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,2-Dichloropropionic acid.........     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1        Dry     Vent F        Yes   .50-73................         NA         NA           G                                                                       2 i                                                                                                    .58-1(e)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diethanolamine.....................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(c)..............         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diethylamine.......................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diethylenetriamine.................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(c)..............         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diethyl ether, see Ethyl ether.....----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diisobutylamine....................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diisopropanolamine.................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(c)..............         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diisopropylamine...................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------N,N-Dimethylacetamide..............     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .56-1(b)..............        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dimethylamine......................     Press.    Amb.        II       1NA  Ind. Pressure.........        SR    Restr.        II       P-2         NR     Vent F        Yes   .55-1(c)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dimethylethanolamine...............     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .56-1(b), (c).........        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dimethylformamide..................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(e)..............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,4-Dioxane........................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1      Inert     Vent F        Yes   No....................        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diphenylmethane diisocyanate.......     Atmos.   Elev.        II     1 i i  Integral Gravity......        PV    Closed         I       G-1      Inert     Vent F        Yes   .50-5.................         NA        Yes           G                                                                       2 i                                                                        Dry                         .56-1(a), (b).........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Di-n-propylamine...................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dodecyl- dimethyl- amine,               Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .56-1(b)..............         NA         NA           G Tetradecyldimethylamine mixture.                                      2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dodecyl phenol.....................     Atmos.    Amb.         I     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-73................        I-D         NA           2                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Epichlorohydrin....................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethanolamine.......................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(c)..............        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethyl acrylate.....................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylamine solution (72% or less)..     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .55-1(b)..............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------N-Ethylbutylamine..................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(b)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethyl chloride.....................     Press.    Amb.        II       1NA  Ind. Pressure.........        SR    Restr.        II       P-2         NR     Vent F        Yes   No....................        I-D         NA           8                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------N-Ethylcyclohexylamine.............     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(b)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene chlorohydrin..............     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene cyanohydrin...............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   No....................         NA         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylenediamine....................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene dibromide.................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F         No   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene dichloride................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene glycol monoalkyl ethers...     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-C         NA           GIncluding:.........................                                    2 i2-Ethoxyethanol....................Ethylene glycol butyl ether........Ethylene glycol tert-butyl ether...Ethylene glycol ethyl ether........Ethylene glycol methyl ether.......Ethylene glycol n-propyl ether.....Ethylene glycol isopropyl ether....----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene glycol hexyl ether........     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene glycol propyl ether.......     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene oxide.....................     Press.    Amb.         I       1NA  Ind. Pressure.........        SR    Restr.        II       P-2      Inert     Vent F        Yes   .50-10................        I-B   .40-1(c)           4                                                                     2 i i                                                                                                    .50-12................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethyl ether........................     Atmos.    Amb.        II       1NA  Ind. Gravity..........        PV    Closed        II       G-1      Inert     Vent F        Yes   .50-40................        I-C         NA           G                                                                     2 i i                                                                                                    .50-42................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Ethylhexyl acrylate..............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylidene norbornene..............     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .50-5.................         NA         NA           G                                                                     2 i i                                                                                                    .50-74................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethyl methacrylate.................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Ethyl-3-propylacrolein...........     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-C         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ferric chloride solutions..........     Atmos.    Amb.       III     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-20................        I-B         NA           G                                                                     2 i i                                                                                                    .50-75................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Fluorosilicic acid (30% or less)...     Atmos.    Amb.        II     1 i i  Ind. Gravity..........        PV    Closed        II       G-1         NR     Vent F         No   .50-20................        I-B         NA           4                                                                     2 i i                                                                                                    .50-22................                                                                                                                                                                              .50-73................                                                                                                                                                                              .50-77................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Formaldehyde solution (37% to 50%).     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   .55-1(h)..............        I-B         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Formic acid........................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-73................        I-D         NA           G                                                                       2 i                                                                                                    .55-1(i)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Furfural...........................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(h)..............        I-C         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Glutaraldehyde solution (50% or         Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   No....................         NA         NA           G less).                                                                2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Glyoxylic acid solution (50% or         Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-73................         NA         NA           G less).                                                              2 i i                                                                                                    .50-81................                                                                                                                                                                              .58-1(e)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Hexamethylenediamine solution......     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Hexamethyleneimine.................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .56-1(b), (c).........        I-C         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Hydrochloric acid..................     Atmos.    Amb.       III       1NA  Ind. Gravity..........      Open      Open        II       G-1         NR     Vent F         No   .50-20................        I-B         NA           4                                                                     2 i i                                                                                                    .50-22................                                                                                                                                                                              .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Hydrofluorosilicic acid (25% or less), see Fluorosilicic acid (30% or less).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Hydroxyethyl acrylate............     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................         NA         NA           G                                                                       2 i                                                                                                    .50-70(a).............                                                                                                                                                                              .50-73................                                                                                                                                                                              .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Isoprene...........................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV      Open        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Kraft pulping liquors (free alkali      Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR         NR         No   .50-73................         NA         NA           G content 3% or more) (including:                                       2 i                                                                                                    .56-1(a), (c), (g).... Black, Green, or White liquor).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Mesityl oxide......................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methylacetylene, Propadiene mixture     Press.    Amb.       III      1 NA  Ind. Pressure.........        SR    Restr.        II       P-2         NR     Vent F        Yes   .50-79................        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl acrylate....................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methylamine solution (42% or less).     Atmos.    Amb.        II       1NA  Ind. Gravity..........        PV    Closed        II       G-1         NR     Vent F        Yes   .56-1(a), (b), (c),           I-D         NA           G                                                                     2 i i                                                                                                     (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl bromide.....................     Press.    Amb.         I       1NA  Ind. Pressure.........        SR    Closed         I       P-2         NR     Vent F        Yes   .50-5.................        I-D         NA           2                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl chloride....................     Press.    Amb.        II       1NA  Ind. Pressure.........        SR    Restr.        II       P-2         NR     Vent F        Yes   .55-1(c)..............        I-D         NA           8                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methylcyclopentadiene dimer........     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-B         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl diethanolamine..............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .56-1(b), (c).........        I-C         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Methyl-5-ethylpyridine...........     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(e)..............        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl methacrylate................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Methylpyridine...................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------alpha-Methylstyrene................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Monochloro- difluoromethane........     Press.    Amb.       III       1NA  Ind. Pressure.........        SR    Restr.         I       P-1         NR         NR         No   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Morpholine.........................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(c)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Motor fuel anti-knock compounds         Atmos.    Amb.         I     1 i i  Ind. Gravity..........        PV    Closed         I       G-1         NR     Vent F        Yes   .50-6.................        I-D         NA       .50-6 (containing lead alkyls).                                           2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Nitric acid (70% or less)..........     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   .50-20................        I-B         NA           4                                                                     2 i i                                                                                                    .50-73................                                                                                                                                                                              .50-80................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Nitrobenzene.......................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Nitrogen, liquefied................     Press.     Low       III       1NA  Ind. Pressure.........        SR    Restr.      II-L       P-1         NR     Vent F         No   .40-1(a)..............         NA   .40-1(a)           G                                                                       2 i                                                                                                    .50-30................                                                                                                                                                                              .50-36................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1- or 2-Nitropropane...............     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-81................        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------o-Nitrotoluene.....................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Octyl nitrates (all isomers), see Alkyl(C7-C9) nitrates.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Oleum..............................     Atmos.    Amb.       III     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-20................        I-B         NA           4                                                                     2 i i                                                                                                    .50-21................                                                                                                                                                                              .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Pentachloroethane..................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,3-Pentadiene.....................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Perchloroethylene..................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   No....................         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Phenol.............................     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           2                                                                       2 i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Phosphoric acid....................     Atmos.    Amb.       III     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-20................        I-B         NA           4                                                                       2 i                                                                                                    .50-23................                                                                                                                                                                              .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Phosphorus, white (elemental)......     Atmos.   Elev.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1      Water     Vent F        Yes   .50-50................         NA         NA         4-8                                                                     2 i i                                                                        Pad----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Phthalic anhydride (molten)........     Atmos.   Elev.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Polyethylene polyamines............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(e)..............         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Polymethylene polyphenyl isocyanate     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1        Dry     Vent F        Yes   .55-1(e)..............         NA         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Potassium hydroxide solution, see Caustic potash solution.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------iso-Propanolamine..................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(c)..............        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Propanolamine (iso-, n-)...........     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .56-1(b), (c).........        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Propionic acid.....................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-73................        I-D         NA           G                                                                     2 i i                                                                                                    .55-1(g)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------iso-Propylamine....................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .55-1(c)..............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Propylene oxide....................     Press.    Amb.        II       1NA  Ind. Pressure.........        SR    Restr.        II       P-1      Inert     Vent F        Yes   .50-10................        I-B         NA           G                                                                     2 i i                                                                                                    .50-13................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------iso-Propyl ether...................     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1      Inert     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Pyridine...........................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(e)..............        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium aluminate solution (45% or       Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR         NR         No   .50-73................         NA         NA           G less).                                          Elev.                 2 i                                                                                                    .56-1(a), (b), (c)....----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium chlorate solution (50% or        Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-73................         NA         NA           G less).                                                                2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium dichromate solution (70% or      Atmos.    Amb.        II     1 i i  Integral Gravity......      Open    Closed        II       G-1         NR     Vent N         No   .50-5(d)..............         NA         NA           G less).                                                              2 i i                                                                                                    .50-73................                                                                                                                                                                              .56-1(b), (c).........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium hydroxide solution, see Caustic soda solution.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium hypochlorite solution (20%       Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   .50-73................         NA         NA           G or less).                                                           2 i i                                                                                                    .56-1(a), (b).........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium sulfide, hydrosulfide            Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-73................         NA         NA           G solutions (H2S 15ppm or less).                                        2 i                                                                                                    .55-1(b)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium sulfide, hydrosulfide            Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   .50-73................         NA         NA           G solutions (H2S greater than 15ppm                                     2 i                                                                                                    .55-1(b).............. but less than 200ppm).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium sulfide, hydrosulfide            Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F         No   .50-73................         NA         NA           G solutions (H2S greater than                                           2 i                                                                                                    .55-1(b).............. 200ppm).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium thiocyanate solution (56% or     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .58-1(a)..............         NA         NA           G less).                                                                2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Styrene monomer....................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sulfur (molten)....................     Atmos.   Elev.       III       1 i  Integral Gravity......      Open      Open        II       G-1     Vent N     Vent N        Yes   .50-55................        I-C       .40-           G                                                                     2 i i                                                                                                                                         1(f)(1)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sulfur dioxide.....................     Press.    Amb.         I       1NA  Ind. Pressure.........        SR    Closed  ........       P-2         NR     Vent F         No   .50-30................         NA         NA           2                                                                     2 i i                                                                                                    .50-84................                                                                                                                                                                              .55-1(j)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sulfuric acid......................     Atmos.    Amb.       III     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-20................        I-B         NA           4                                                                     2 i i                                                                                                    .50-21................                                                                                                                                                                              .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sulfuric acid, spent...............     Atmos.    Amb.       III     1 i i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N         No   .50-20................        I-B         NA           4                                                                     2 i i                                                                                                    .50-21................                                                                                                                                                                              .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,1,2,2-Tetrachloroethane..........     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   No....................         NA         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Tetraethylenepentamine.............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(c)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Tetrahydrofuran....................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(b).............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Toluenediamine.....................     Atmos.   Elev.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .50-73................         NA         NA           G                                                                       2 i                                                                                                    .56-1(a), (b), (c),                                                                                                                                                                               (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Toluene diisocyanate...............     Atmos.    Amb.         I     1 i i  Integral Gravity......        PV    Closed         I       G-1        Dry     Vent F        Yes   .50-5.................        I-D         NA           G                                                                     2 i i                                                                        N 2                         .55-1(e)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------o-Toluidine........................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Closed        II       G-1         NR     Vent F        Yes   .50-5.................        I-D         NA           G                                                                     2 i i                                                                                                    .50-73................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,2,4-Trichlorobenzene.............     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   No....................        I-D         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,1,2-Trichloroethane..............     Atmos.    Amb.       III     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   .50-73................        I-D         NA           G                                                                       2 i                                                                                                    .56-1(a)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Trichloroethylene..................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   No....................        I-D         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,2,3-Trichloropropane.............     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-73................        I-D         NA           G                                                                       2 i                                                                                                    .56-1(a)..............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Triethanolamine....................     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(b)..............        I-C         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Triethylamine......................     Atmos.    Amb.        II     1 i i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .55-1(e)..............        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Triethylenetetramine...............     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR     Vent N        Yes   .55-1(b)..............        I-C         NA           G                                                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Triphenylborane (10% or less),          Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR         NR         No   .56-1(a), (b), (c)....         NA         NA           G Caustic soda solution.                                                2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Trisodium phosphate solution.......     Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR         NR         No   .50-73................         NA         NA           G                                                 Elev.                 2 i                                                                                                    .56-1(a), (c).........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Urea, Ammonium nitrate solution         Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F         No   .56-1(b)..............        I-D         NA           G (containing more than 2% NH 3).                                       2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Valeraldehyde (all isomers)........     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1      Inert     Vent F        Yes   No....................        I-C         NA           G                                                                     2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vanillan black liquor (free alkali      Atmos.    Amb.       III       1 i  Integral Gravity......      Open      Open        II       G-1         NR         NR         No   .50-73................         NA         NA           G content 3% or more).                                                  2 i                                                                                                    .56-1(a), (c), (g)....----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinyl acetate......................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV      Open        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinyl chloride.....................     Press.    Amb.        II       1NA  Ind. Pressure.........        SR    Closed        II       P-2         NR     Vent F        Yes   .50-30................        I-D         NA           8                                                                     2 i i                                                                                                    .50-34................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinyl chloride.....................     Atmos.     Low        II       1NA  Ind. Gravity..........        PV    Closed      II-L       G-2         NR     Vent F        Yes   .50-30................        I-D       .40-           8                                                                     2 i i                                                                                                    .50-34................               1(b)(1)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinylidene chloride................     Atmos.    Amb.        II       1NA  Ind. Gravity..........        PV    Closed        II       P-2     Padded     Vent F        Yes   .55-1(f)..............        I-D         NA           G                                                                     2 i i                                                                                                    .50-70(a).............                                                                                                                                                                              .50-81(a), (b)........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinyltoluene.......................     Atmos.    Amb.       III       1 i  Integral Gravity......        PV    Restr.        II       G-1         NR     Vent F        Yes   .50-70(a).............        I-D         NA           G                                                                     2 i i                                                                                                    .50-81................                                                                                                                                                                              .56-1(a), (b), (c),                                                                                                                                                                               (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------For requirements see these sections  .........  ......     .10-1    .13- 5  .15- 1................     .15-5   .15- 10    .20- 1    .20- 5      .25-1      .25-2        .30   ......................    111.105        .40     .04- 5 in Part 151:.                                                                                                                                                                                            (Sub-                                                                                                                                                                                                      chapter J)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------See Table 2 of Part 153 for additional cargoes permitted to be carried by tankbarge.Terms and symbols:Segregation_Tank_ Line 1_Segregation of cargo from surrounding waters: i=Skin of vessel (single skin) only required. Cargo tank wall can be vessel's hull. i i=Double skin required. Cargo tank wall cannot be vessel's hull. Line 2_Segregation of cargo space from machinery spaces and other spaces which have or could have a source of ignition: i=Single bulkhead only required. Tank wall can be sole separating medium. i i=Double bulkhead required. Cofferdam, empty tank, pumproom, tank with Grade E Liquid (if compatible with cargo) is satisfactory.Internal tank inspection_ G_Indicates cargo is subject to general provisions of 151.04-5(b). Specific numbers in this column are changes from the general provisions.Abbreviations used:Tank type: Ind=Independent.Vent: PV=Pressure vacuum valve. SR=Safety relief.Gauging device: Restr.=Restricted.General usage: NR=No requirement. NA=Not applicable.1. The provisions contained in 46 CFR Part 197, subpart C, apply to liquid cargoes containing 0.5% or more benzene by volume.

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