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 D — Special Design and Operating Requirements154.172046 C.F.R. § 154.1720Indirect refrigeration.Last amended: 2016Year: 2026Length: 26 wordsOfficial source Cite as 46 C.F.R. § 154.1720 (2026)A refrigeration system that is used to cool acetaldehyde, ethylene oxide, or methyl bromide, must be an indirect refrigeration system that does not use vapor compression.Previous46 C.F.R. § 154.1715Next46 C.F.R. § 154.1725