US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter II — FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 230 — STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDSSubpart B — Boilers and Appurtenances230.5049 C.F.R. § 230.50Time of testing.Last amended: 2017Year: 2026Length: 26 wordsOfficial source Cite as 49 C.F.R. § 230.50 (2026)All safety relief valves shall be tested, and adjusted if necessary, under steam at every 92 service day inspection, and also whenever any irregularity is reported.Previous49 C.F.R. § 230.49Next49 C.F.R. § 230.51