{"data":{"id":"us/46-cfr-64.47","jurisdiction":"us","citation":"46 CFR 64.47","heading":"Type of relief devices.","body":"(a) An MPT with an internal capacity of more than 550 U.S. gallons must have one or more spring loaded relief valves. In addition, a rupture disc may be attached.\n(b) An MPT with an internal capacity of 550 U.S. gallons or less must have a rupture disc or a spring loaded relief valve.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER F—MARINE ENGINEERING","PART 64—MARINE PORTABLE TANKS AND CARGO HANDLING SYSTEMS","Subpart B—Standards for an MPT"],"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":"affa4aba0fb0bc937c28233755a5058ec8dfe942a6acb0ff968c1de7d040fbda","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-64.45","next":"us/46-cfr-64.49"},"notice":"GroundRules: Original legal text. Not legal advice."}