US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter II — FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 229 — RAILROAD LOCOMOTIVE SAFETY STANDARDSSubpart C — Safety Requirements229.10349 C.F.R. § 229.103Safe working pressure; factor of safety.Last amended: 2017Year: 2026Length: 40 wordsOfficial source Cite as 49 C.F.R. § 229.103 (2026)The safe working pressure for each steam generator shall be fixed by the chief mechanical officer of the carrier. The minimum factor of safety shall be four. The fixed safe working pressure shall be indicated on FRA Form F 6180-49A.Previous49 C.F.R. § 229.101Next49 C.F.R. § 229.105