US lawFederal (United States)RegulationsTitle 46 CFR — ShippingChapter I — COAST GUARD, DEPARTMENT OF HOMELAND SECURITYPart 154 — SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASESSubpart C — Design, Construction and Equipment154.43246 C.F.R. § 154.432Expansion and contraction.Last amended: 2016Year: 2026Length: 19 wordsOfficial source Cite as 46 C.F.R. § 154.432 (2026)The support system of a membrane tank must allow for thermal and physical expansion and contraction of the tank.Previous46 C.F.R. § 154.431Next46 C.F.R. § 154.435