{"data":{"id":"us/46-cfr-154.1725","jurisdiction":"us","citation":"46 CFR 154.1725","heading":"Ethylene oxide.","body":"(a) A vessel carrying ethylene oxide must:\n(1) Have cargo piping, vent piping, and refrigeration equipment that have no connections to other systems;\n(2) Have valves, flanges, fittings, and accessory equipment made of steel, stainless steel, except types 416 and 442, or other material specially approved by the Commandant (CG-OES);\n(3) Have valve disk faces, and other wearing parts of valves made of stainless steel containing not less than 11% chromium;\n(4) Have gaskets constructed of spirally wound stainless steel with Teflon or other material specially approved by the Commandant (CG-OES);\n(5) Not have asbestos, rubber, or cast iron components in the cargo containment system and piping;\n(6) Not have threaded joints in cargo piping;\n(7) Have a water spray system under § 154.1105 that protects the above deck cargo piping; and\n(8) Have a nitrogen inerting system or on board nitrogen gas storage that can inert the vapor space of an ethylene oxide cargo tank for a period of 30 days under the condition of paragraph (e) of this section.\n(b) Cargo hose used for ethylene oxide must:\n(1) Be specially approved by the Commandant (CG-OES); and\n(2) Be marked “For (Alkylene or Ethylene) Oxide Transfer Only.”\n(c) Ethylene oxide must be maintained at less than 30 °C (86 °F).\n(d) Cargo tank relief valves for tanks containing ethylene oxide must be set at 539 kPa gauge (78.2 psig) or higher.\n(e) The vapor space of a cargo tank carrying ethylene oxide must be maintained at a nitrogen concentration of 45% by volume.\n(f) A vessel must have a method for jettisoning ethylene oxide that meets §§ 154.356 and 154.1872.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER O—CERTAIN BULK DANGEROUS CARGOES","PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES","Subpart D—Special Design and Operating Requirements"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"766827f9d41e5f64e879a0d1f62526bd72b95519a2be46f0eedfac4f4bdd4fd3","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-154.1720","next":"us/46-cfr-154.1730"},"notice":"GroundRules: Original legal text. Not legal advice."}