{"data":{"id":"us/46-cfr-64.13","jurisdiction":"us","citation":"46 CFR 64.13","heading":"Allowable stress; tank.","body":"(a) The calculated stress in the tank under design conditions, including dynamic loading conditions applied simultaneously, must not exceed the allowable stress listed in Section VIII of the ASME BPVC (incorporated by reference; see § 64.2), for a design temperature of 122 °F.\n(b) The calculated stress in the tank at test pressure must not exceed 75 percent of the minimum yield stress, or 37.5 percent of the minimum tensile stress of the material, whichever is less.\nNote 1 to paragraph (b):\nThe minimum yield stress and minimum tensile stress are listed in Section VIII of the ASME BPVC.","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":"b9cfa0e15a132812f940af444e83d7862b2aeb7b33bcc9b26ab7e5a87bd3c08a","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-64.11","next":"us/46-cfr-64.15"},"notice":"GroundRules: Original legal text. Not legal advice."}