{"data":{"id":"us/46-cfr-151.50-36","jurisdiction":"us","citation":"46 CFR 151.50-36","heading":"-36 Argon or nitrogen.","body":"(a) A cargo tank that contains argon or nitrogen and that has a maximum allowable working pressure of 172 kPa (25 psig) or greater must have one of the following arrangements:\n(1) A refrigeration system that keeps the tank pressure below the safety relief valve operating pressure when ambient temperatures are 46 °C (115 °F) air and 32 °C (90 °F) water.\n(2) A relief valve or pressure control valve that maintains the tank pressure below the setting of the tank's required safety relief valve in ambient temperatures of 46 °C (115 °F) air and 32 °C (90 °F) water.\n(b) A cargo tank with a maximum allowable working pressure of less than 172 kPa (25 psig) is approved by the Commandant (CG-ENG) on a case by case basis.\n(c) Section 151.50-30 also applies to the carriage of argon or nitrogen.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER O—CERTAIN BULK DANGEROUS CARGOES","PART 151—BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES","Subpart 151.50—Special 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":"bc0cfe00568f4060cc51c7c82a36cb0de13d5d3d9baa525d99efc44f54e23a5a","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-151.50-34","next":"us/46-cfr-151.50-40"},"notice":"GroundRules: Original legal text. Not legal advice."}