46 C.F.R. § 53.05-2 Relief valve requirements for hot water boilers (modifies HG–400.2).
Title 46 - Shipping
(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).
Title 46: Shipping
PART 53—HEATING BOILERS
Subpart 53.05—Pressure Relieving Devices (Article 4)
§ 53.05-2 Relief valve requirements for hot water boilers (modifies HG–400.2).
