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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 46
Chapter I
Part 53
Subpart 53.05 - 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 and valve markings.
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