StacksVerified U.S. regulatory reference

46 CFR §53.05-1

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (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.
  2. (b)Each steam boiler must have at least one safety valve.