{"data":{"id":"us/46-cfr-64.61","jurisdiction":"us","citation":"46 CFR 64.61","heading":"Rupture disc.","body":"If a rupture disc is the only pressure relief device on the tank, the rupture disc must—\n(a) Rupture at a pressure of 125 percent of the maximum allowable working pressure; and\n(b) Have a minimum normal venting capacity that is sufficient to prevent the tank pressure from exceeding 137.5 percent of the maximum allowable working pressure.","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 C—Pressure Relief Devices and Vacuum Relief Devices for MPTs"],"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":"02457b5b1e50cad51bb64ce2ed48d45bd2c7cbf75c255e86b45a407ae6b40120","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-64.59","next":"us/46-cfr-64.63"},"notice":"GroundRules: Original legal text. Not legal advice."}