46 C.F.R. § 54.01-5 Scope (modifies U–1 and U–2).
Title 46 - Shipping
(a) This part contains requirements for pressure vessels. Table 54.01–5(a) gives a breakdown by parts in this subchapter of the regulations governing various types of pressure vessels, boilers, and thermal units. (b) Pressure vessels are divided into Classes I, I-L (low temperature), II, II-L (low temperature), and III. Table 54.01–5(b) describes these classes and sets out additional requirements for welded pressure vessels. (c) The requirements for pressure vessels by class are as follows: (1) Class I-L and II-L pressure vessels must meet the applicable requirements in this part. (2) Pressure vessels containing hazardous materials as defined in §150.115 of this chapter must meet the requirements of this part or, as applicable, the requirements in 49 CFR parts 171–177 or part 64 of this chapter. (3) Except as provided in paragraph (c)(4) of this section, Classes I, II, and III pressure vessels not containing hazardous materials must be designed and constructed in accordance with the requirements in Section VIII, division 1, of the ASME Code and must be stamped with the ASME “U” symbol. These pressure vessels must also comply with the requirements that are listed or prescribed in paragraphs (d) through (g) of this section. Compliance with other provisions in this part is not required. (4) Classes II and III pressure vessels that have a net internal volume of less than 0.14 cubic meters (5 cubic feet) and do not contain hazardous materials must be stamped with either the ASME “U” or “UM” symbol. Compliance with other provisions in this part is not required. (d) Pressure vessels described in paragraph (c)(3) of this section must— (1) Have detailed plans that include the information required by §54.01–18 (approved by the Office of Management and Budget under OMB control number 2130–0181); (2) Meet §54.01–35, §54.20–3(c), and §54.25–3 of this part; (3) Have pressure relief devices required by subpart 54.15; (4) Meet the applicable requirements in §§54.10–3, 54.10–20, and 54.10–25 for inspection, reports, and stamping; (5) If welded, meet the post weld heat treatment and minimum joint and radiography requirement in Table 54.01–5(b); and (6) If a steam generating pressure vessel, meet §54.01–10. (e) The plans required by paragraph (d)(1) of this section must be certified by a registered professional engineer to meet the design requirements in paragraph (d) of this section and in section VIII, division 1, of the ASME Code. The certification must appear on all drawings and analyses. The plans must be made available to the Coast Guard prior to the inspection required by §54.10–3(c). (f) If a pressure vessel has more than one independent chamber and the chambers have different classifications, each chamber must, as a minimum, meet the requirements for its classification. If a single classification for the entire pressure vessel is preferred, the classification selected must be one that is required to meet all of the regulations applicable to the classification that is not selected. For example, if one chamber is Class I and one chamber is Class II-L, the only single classification that can be selected is Class I-L. (g) The design pressure for each interface between two chambers in a multichambered pressure vessel must be— (1) The maximum allowable working pressure (gauge) in the chamber with the higher pressure; or (2) If one chamber is a vacuum chamber, the maximum allowable working pressure (absolute) in the other chamber minus the least operating pressure (absolute) in the vacuum chamber. [CGFR 68–82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69–127, 35 FR 9976, June 17, 1970; CGD 77–147, 47 FR 21809, May 20, 1982; 55 FR 696, Jan. 8, 1990; CGD 88–057, 55 FR 24236, June 15, 1990; CGD 85–061, 55 FR 41917, Oct. 16, 1990; CGD 95–027, 61 FR 26000, May 23, 1996; USCG–2000–7790, 65 FR 58460, Sept. 29, 2000]
Title 46: Shipping
PART 54—PRESSURE VESSELS
Subpart 54.01—General Requirements
§ 54.01-5 Scope (modifies U–1 and U–2).
Table 54.01-5(a)_Regulation Reference for Boilers, Pressure Vessels, and Thermal Units------------------------------------------------------------------------ Part of Part of subchapter subchapter Service and pressure temperature boundaries regulating regulating mechanical automatic design control------------------------------------------------------------------------Main (power) boiler: All...................... 52 62Pressure vessel: All.......................... 54 NAFired auxiliary boiler \1\ (combustion products or electricity): (a) Steam: More than 103 kPa (15 psig)............... 52 \2\ 62 or 63 Equal to or less than 103 kPa (15 psig)... 53 63 (b) Hot water heating: More than 689 kPa (100 psig) or 121 °C 52 63 (250 °F)............................. Equal to or less than 689 kPa (100 psig) 53 63 and 121 °C (250 °F).............. (c) Hot water supply: More than 689 kPa (100 psig) or 121 °C 52 63 (250 °F)............................. Equal to or less than 689 kPa (100 psig) 53 63 and 121 °C (250 °F)..............Other: (a) Fired thermal fluid heaters: All........ 52 63 (b) Unfired steam boiler: More than 206 kPa (30 psig) or 454 °C 52 NA (850 °F) \3\......................... Equal to or less than 206 kPa (30 psig) 54 NA and 454 °C (850 °F).............. (c) Evaporators and heat exchangers: More 54 NA than 103 kPa (15 psig) \4\................. (d) Unfired hot water supply or heating 54 NA boiler: More than 103 kPa (15 psig) \4\....------------------------------------------------------------------------\1\ Including exhaust gas types.\2\ Boilers with heat input ratings >=12,500,000 Btu/hr. must have controls that meet part 62. Boilers with heat input ratings <12,500,000 Btu/hr. must have controls that meet part 63.\3\ Temperature of working fluid.\4\ Relief device is required even if designed for less than 103 kPa (15 psig).
Table 54.01-5(b)_Pressure Vessel Classification-------------------------------------------------------------------------------------------------------------------------------------------------------- Radiography Class limits on Joint requirements requirements, Post weld heat Shop inspect. Plan approval Class Service contents pressure and \1,6,7\ section VIII, ASME treatment required required required temperature Code \3,7\ \5,7\--------------------------------------------------------------------------------------------------------------------------------------------------------I................... (a) Vapor or gas... Over 600 p.s.i. or (1) For category Full on all butt For carbon or low Yes \4\...... Yes \4\. (b) Liquid......... 700 °F A; (1) or (2) For joints regardless alloy steel, in (c) Hazardous Over 600 p.s.i. or category B. All of thickness. accordance with materials \2\. 400 °F. categories C and Exceptions listed Table UCS-56, D must have full in Table UCS-57 regardless of penetration welds of ASME Code do thickness. For extending through not apply. other materials, the entire in accordance thickness of the with section vessel wall or VIII, ASME Code. nozzle wall.I-L Low temperature. (a) Vapor or gas... Over 250 p.s.i. and (1) for categories Full on all butt For carbon or low Yes.......... Yes. ................... service A and B. All joints regardless alloy steel, in (b) Liquid......... temperature below categories C and of thickness. accordance with (c) Hazardous 0 °F D must have full Exceptions listed Table UCS-56, materials \2\. Over 250 p.s.i. and penetration welds in Table UCS-57 regardless of service extending through of ASME Code do thickness. For temperature below the entire not apply. other materials, 0 °F. thickness of the in accordance vessel wall or with section nozzle wall. No VIII, ASME Code. backing rings or strips left in place.II.................. (a) Vapor or gas... 30 through 600 (1) or (2) for Spot, unless In accordance with Yes \4\...... Yes \4\. ................... p.s.i. or 275° category A. (1), exempted by UW- section, VIII of (b) Liquid......... through 700 °F (2), or (3) for 11(c) of ASME ASME Code. (c) Hazardous 200 through 600 category B. Code. materials \2,3,6\. p.s.i. or 250° Categories C and through 400 °F. D in accordance with UW-16 of ASME Code.II-L Low temperature (a) Vapor or gas... 0 through 250 (1) for category Spot. The Same as for I-L Yes.......... Yes. ................... p.s.i. and service A; (1) or (2) for exemption of UW- except that (b) Liquid......... temperature below category B. All II(c) of ASME mechanical stress (c) Hazardous 0 °F categories C and Code does not relief may be materials \2\. 0 through 250 D must have full apply. substituted if p.s.i. and service penetration welds allowed under temperature below extending through subpart 54.30 of 0 °F. the entire this chapter. thickness of the vessel wall or nozzle wall.III................. (a) Vapor or gas... Under 30 p.s.i. and In accordance with Spot, unless In accordance with Yes \4\...... Yes \4\. (b) Liquid......... 0° through 275 Section VIII of exempted UW-II(c) Section VIII of (c) Hazardous °F AMSE Code. of ASME Code. ASME Code. materials \2,3,6\. Under 200 p.s.i. and 0° through 250 °F.--------------------------------------------------------------------------------------------------------------------------------------------------------\1\ Welded joint categories are defined under UW-3 of the ASME Code. Joint types are described in Table UW-12 of the ASME Code, and numbered ``(1),'' ``(2)'', etc.\2\ See § 54.20-2.\3\ See §§ 54.25-8(c) and 54.25-10(d).\4\ See §§ 54.01-15 and 54.10-3 for exemptions.\5\ Specific requirements modifying Table UCS-56 of the ASME Code are found in § 54.25-7.\6\ See § 54.20-3 (c) and (f)\7\ Applies only to welded pressure vessels.
(Approved by the Office of Management and Budget under OMB control number 2130–0181)
