{"data":{"id":"us/46-cfr-154.904","jurisdiction":"us","citation":"46 CFR 154.904","heading":"Inert gas system: Controls.","body":"The inert gas system must have:\n(a) At least one check valve in the cargo area to prevent the back flow of cargo vapor into the inert gas system, or another means specially approved by the Commandant (CG-OES);\n(b) If the inert gas system is in the machinery space or another space outside the cargo area, a second check valve in the cargo area meeting paragraph (a) of this section;\n(c) Automatic and manual inert gas pressure controls; and\n(d) Valves to isolate each inerted space.","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 C—Design, Construction and Equipment"],"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":"ea29d69ffe5f0ee36e1ef126b036e4d8262e2b1762974c80ca1425340d6ca91a","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-154.903","next":"us/46-cfr-154.906"},"notice":"GroundRules: Original legal text. Not legal advice."}