Title 49: Transportation
PART 179—SPECIFICATIONS FOR TANK CARS
Subpart F—Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)
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§ 179.500-18 Inspection and reports.
(a) Before a tank car is placed in service, the party assembling the completed car shall furnish to car owner, Bureau of Explosives, and the Secretary, Mechanical Division, Association of American Railroads, a report in proper form certifying that tanks and their equipment comply with all the requirements of this specification and including information as to serial numbers, dates of tests, and ownership marks on tanks mounted on car structure.
(b) Purchaser of tanks shall provide for inspection by a competent inspector as follows:
(1) Inspector shall carefully inspect all material and reject that not complying with §179.500–5.
(2) Inspector shall stamp his official mark on each forging or seamless tube accepted by him for use in making tanks, and shall verify proper application of heat number to such material by occasional inspections at steel manufacturer's plant.
(3) Inspector shall obtain certified chemical analysis of each heat of material.
(4) Inspector shall make inspection of inside surface of tanks before necking-down, to insure that no seams, cracks, laminations, or other defects exist.
(5) Inspector shall fully verify compliance with specification, verify heat treatment of tank as proper; obtain samples for all tests and check chemical analyses; witness all tests; and report minimum thickness of tank wall, maximum inside diameter, and calculated value of D, for each end of each tank as prescribed in §179.500–4(c).
(6) Inspector shall stamp his official mark on each accepted tank immediately below serial number, and make certified report (see paragraph (c) of this section) to builder, to company or person for whose use tanks are being made, to builder of car structure on which tanks are to be mounted, to the Bureau of Explosives, and to the Secretary, Mechanical Division, Association of American Railroads.
(c) Inspector's report required herein shall be in the following form:
(Place)____________________
(Date)____________________
Steel Tanks
It is hereby certified that drawings were submitted for these tanks under AAR Application for Approval ______ and approved by the AAR Committee on Tank Cars under date of ______.
Built for ____________ Company
Location at____________________
Built by ____________ Company
Location at____________________
Consigned to _________ Company
Location at____________________
Quantity____________________
Length (inches)____________________
Outside diameter (inches)____________________
Marks stamped into tank as required in §179.500–17 are:
DOT-107A* * * *
Note 1: The marked test pressure substituted for the * * * * on each tank is shown on Record of General Data on Tanks attached hereto.
Serial numbers __ to __ inclusive
Inspector's mark____________________
Owner's mark____________________
Test date____________________
Water capacity (see Record of Hydrostatic Tests).
Tare weights (yes or no) (see Record of Hydrostatic Tests).
These tanks were made by process of____________________
Steel used was identified as indicated by the attached list showing the serial number of each tank, followed by the heat number.
Steel used was verified as to chemical analysis and record thereof is attached hereto. Heat numbers were stamped into metal. All material was inspected and each tank was inspected both before and after closing in ends; all material accepted was found free from seams, cracks, laminations, and other defects which might prove injurious to strength of tank. Processes of manufacture and heat-treatment of tanks were witnessed and found to be efficient and satisfactory.
Before necking-down ends, each tank was measured at each location prescribed in §179.500–4(c) and minimum wall thickness in inches at each location was recorded; maximum inside diameter in inches at each location was recorded; value of D in inches at each location was calculated and recorded; maximum fiber stress in wall at location showing larger value for
(D2 +d2 )/(D2 −d2 )
was calculated for 7/10 the marked test pressure and recorded. Calculations were made by the formula:
S=[0.7P(D2 −d2 )/(D2 +d2 )]
Hydrostatic tests, tensile test of material, and other tests as prescribed in this specification, were made in the presence of the inspector, and all material and tanks accepted were found to be in compliance with the requirements of this specification. Records thereof are attached hereto.
I hereby certify that all of these tanks proved satisfactory in every way and comply with the requirements of Department of Transportation Specification No. 107A * * * *.
(Signed)____________________
(Inspector) (Place)____________________
(Date)____________________
Record of Chemical Analysis of Steel for Tanks
Numbered ____ to ____ inclusive
Size _ inches outside diameter by _ inches long
Built by ____________ Company
For _______________ Company
------------------------------------------------------------------------ Tanks Chemical analysis Heat represented ------------------------------------------------ No. (serial Nos.) C Mn P S Si Ni Cr Mo------------------------------------------------------------------------ ------------------------------------------------------------------------
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These analyses were made by (Signed)____________________
(Place)____________________
(Date)____________________
Record of Chemical Analysis of Steel in Tanks
Numbered ____ to ____ inclusive
Size __ inches outside by __ inches long
Built by ____________ Company
For _______________ Company
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------------------------------------------------------------------------ Tanks Heat represented Elastic Tensile Elongation Reduction No. by test limit strength (percent in of area (serial Nos.) (psi) (psi) 2 inches) (percent)------------------------------------------------------------------------ ------------------------------------------------------------------------
(Signed)____________________
(Place)____________________
(Date)____________________
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Record of Hydrostatic Tests on Tanks Numbered................................. to........................... inclusiveSize..................................... inches outside by............ ......... inches longBuilt by........................................................................... CompanyFor...................................... Company......................
---------------------------------------------------------------------------------------------------------------- Percent ratio Total Permanent of permanent Capacity in Serial Nos. of Actual test expansion expansion expansion to Tare weight pounds of tanks pressure (psig) (cubic cm) (cubic cm) total (pounds) \2\ water at 60 expansion \1\ °F---------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------\1\ If tests are made by method involving measurement of amount of liquid forced into tank by test pressure, then the basic data on which calculations are made, such as pump factors, temperature of liquid, coefficient of compressibility of liquid, etc., must also be given.\2\ Do not include protective housing, but state whether with or without valves.
(Signed)____________________
(Place)____________________
(Date)____________________
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Record of General Data on Tanks Numbered................................. to........................... inclusiveBuilt by........................................................................... CompanyFor...................................... Company......................
-------------------------------------------------------------------------------------------------------------------------------------------------------- Data obtained as prescribed in § 179.500-4(c)------------------------------------------------------------------------------------------------- (S) Minimum Marked end of tank Other end of tank Larger value Calculated Marked test tensile------------------------------------------------------------------------------------------------- of the factor fiber stress pressure in strength of (t) Min. (d) Max. (t) Minimum (d) Maximum D\2\+d\2\/ in psi at \7/ psig material inSerial No. thickness of inside (D) Calculated thickness of inside (D) calculated D\2\-d\2\ 10\ marked stamped in psi of tank wall in diameter in value of D in wall in diameter in value of D in test pressure tank recorded inches inches inches=d+2t inches inches inches=d+2t-------------------------------------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------------------------------
(Signed)____________________
[Amdt. 179–32, 48 FR 27708, June 16, 1983, as amended by 66 FR 45391, Aug. 28, 2001]
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