(a) The pressure relief valve requirements and the safety valve requirements for steam boilers must be as indicated in HG-400 and HG-401 of Section IV of the ASME BPVC (incorporated by reference; see § 53.01-1) except as noted otherwise in this section.
(b) Each steam boiler must have at least one safety valve.
[CGD 81-79, 50 FR 9435, Mar. 8, 1985, as amended by USCG-2003-16630, 73 FR 65163, Oct. 31, 2008]
(a) Relief valves. The relief valve requirements for hot water boilers must be as indicated in article 4 of Section IV of the ASME BPVC (incorporated by reference; see § 53.01-1) except as noted otherwise in this section.
(b) Hot water heating boilers. Each hot water heating boiler must have at least one safety relief valve.
(c) Hot water supply boilers. Each hot water supply boiler must have at least one safety relief valve and a temperature relief valve or a pressure-temperature relief valve. The valve temperature setting must not be more than 99 °C (210 °F).
[CGD 81-79, 50 FR 9435, Mar. 8, 1985, as amended by USCG-2003-16630, 73 FR 65163, Oct. 31, 2008]
Materials for valves must be in accordance with HG-401.2 of Section IV of the ASME BPVC (incorporated by reference; see § 53.01-1) except that nonmetallic materials may be used only for gaskets and packing.
[USCG-2003-16630, 73 FR 65164, Oct. 31, 2008]
The discharge capacities and valve markings must be as indicated in HG-402 of Section IV of the ASME BPVC (incorporated by reference; see § 53.01-1). The discharge capacities must be certified by the National Board of Boiler and Pressure Vessel Inspectors.
[USCG-2003-16630, 73 FR 65164, Oct. 31, 2008]
authority: 46 U.S.C. 3306,
3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.3
source: CGFR 68-82, 33 FR 18826, Dec. 18, 1968, as amended by USCG-2020-0634, 89 FR 50102, June 12, 2024, unless otherwise noted.
cite as: 46 CFR 53.05-5