{"data":{"id":"us/46-cfr-153.964","jurisdiction":"us","citation":"46 CFR 153.964","heading":"Discharge by gas pressurization.","body":"The person in charge of cargo transfer may not authorize cargo discharge by gas pressurization unless:\n(a) The tank to be offloaded has an SR or PV venting system;\n(b) The pressurization medium is either the cargo vapor or a nonflammable, nontoxic gas inert to the cargo; and\n(c) The pressurizing line has:\n(1) A pressure reducing valve whose setting does not exceed 90% of the tank's relief valve setting and a manual control valve between the pressure reducing valve and the tank; or\n(2) For an inert gas medium:\n(i) A safety relief valve with a cross sectional flow area at least equal to that of the pressurizing line and whose relieving pressure does not exceed 90 percent of the tank's relief valve setting;\n(ii) A manual control valve between the safety relief valve and the tank; and\n(iii) A check valve between the manual control valve and the tank.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER O—CERTAIN BULK DANGEROUS CARGOES","PART 153—SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS","Subpart C—Operations"],"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":"545c7f682361704819c0c7930f15d9853686dfd08081e91f919108bf721e4399","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-153.959","next":"us/46-cfr-153.966"},"notice":"GroundRules: Original legal text. Not legal advice."}