{"data":{"id":"us/46-cfr-64.19","jurisdiction":"us","citation":"46 CFR 64.19","heading":"External pressure.","body":"(a) A tank without a vacuum breaker must be designed to withstand an external pressure of 7 1/2 psig or more.\n(b) A tank with a vacuum breaker must be designed to withstand an external pressure of 3 psig or more.","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":"61202eb51bb5a247c845c8289fc9c92b5c49b6867f0853530f33b13b4a5d619e","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-64.17","next":"us/46-cfr-64.21"},"notice":"GroundRules: Original legal text. Not legal advice."}