46 C.F.R. Subpart 53.05—Pressure Relieving Devices (Article 4)
Title 46 - Shipping
Source: CGD 81–79, 50 FR 9435, Mar. 8, 1985, unless otherwise noted.
(a) The pressure relief valve requirements and the safety valve requirements for steam boilers must be as indicated in HG–400 and HG–401 except as noted otherwise in this section. (b) Each steam boiler must have at least one safety valve. (a) The relief valve requirements for hot water boilers must be as indicated in article 4 of section IV of the ASME Code 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). (a) Materials for valves must be in accordance with HG–401.2 of the ASME Code except nonmetallic materials may be used only for gaskets and packing. (a) The discharge capacities and valve markings must be as indicated in HG–402 of the ASME Code. The discharge capacities must be certified by the National Board of Boiler and Pressure Vessel Inspectors.
Title 46: Shipping
PART 53—HEATING BOILERS
Subpart 53.05—Pressure Relieving Devices (Article 4)
§ 53.05-1 Safety valve requirements for steam boilers (modifies HG–400 and HG–401).
§ 53.05-2 Relief valve requirements for hot water boilers (modifies HG–400.2).
§ 53.05-3 Materials (modifies HG–401.2).
§ 53.05-5 Discharge capacities andvalve markings.
