{"operation":"document","citation":"98-0598","title":"Truck Trailer Manufacturers Association — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1998-05-05","effective_on":null,"summary":"98-0598 response to Truck Trailer Manufacturers Association concerning 178.345.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-98-0598.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-98-0598.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-98-0598","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/1998/980598.pdf","body":"<<<PAGE 1>>>\n\n-\nKarem\nof Transportation\nU.S. Department\nWashington, D.C.\n400 Seventh Street, S.W.\n20590\nResearch and\nSpecial Programs\nMAY 5 1998\nAdministration\nMr. Donald W. Vierimaa\nVice President-Engineering\nTruck Trailer Manufacturers Association\n1020 Princess Street\nAlexandria, VA 22314\nDear Mr. Vierimaa:\nThis is in response to your letter requesting clarification of your understanding that when\ncalculating the static stresses of non-American Society of Mechanical Engineers (ASME) Code\nstamped DOT 400 series cargo tanks in accordance with § 178.345-3(b), the requirement\nspecified in § 178.345-3(a) (2) is applicable.\nYour understanding of §§ 178.345-3(a) and (b) is correct. In cases where actual physical\nproperty tests of materials are certified showing an actual ultimate tensile strength greater than\nthat shown in the ASME Code or the American Society for Testing and Materials (ASTM)\nstandard, the ultimate tensile strength of the material used in the design may not exceed 120% of\nthe minimum ultimate strength specified in the ASME Code or the ASTM standard. Section\n178.345-3(a)(2) is applicable for the calculation of the static stresses of non-ASME DOT 400\nseries cargo tanks in accordance with §§ 178.345-3(b) and (c).\nI apologize for the delay in preparing this response and hope that it has not caused you any\ninconvenience. If you need further assistance, please contact us.\nSincerely,\nThan I. Allan\nThomas G. Allan\nSenior Transportation Regulations Specialist\nOffice of Hazardous Materials Standards\n98 - 0598\n178,345-3\n\n<<<PAGE 2>>>\n\n;\nTruck Trailer Manufacturers Association\nHM Khrim\n178345\n1020 PRINCESS STREET\nALEXANDRIA, VA. 22314\nRICHARD P. BOWLING\nPRESIDENT\n4-20-4\nFAX: 1-703-549-3014\n(703) 549-3010\nJune 15, 1995\nEdward T. Mazzullo\nDirector, Office of Hazardous Materials Standards\nResearch & Special Programs Administration\nU.S. Department of Transportation\nWashington, D.C.\n400 Seventh Street, S.W.\n20590\nSubject:\nApplies to 178.345-3(b), Static Stress Calculations\nDear Mr. Mazzullo:\nallowable stress prescribed in the ASME Code or 25 percent of the tensile\n. 178.345-3(a) states that the calculated design stress may not exceed the\nStrength of the material used. 178.345-3(a) (2) states that if 25 percent of\nactual tensile strength shall be\nThe\nmaterial used.\ndetexmined by physical property tests of the\n.. •\nnon-ASME DOT 406, DOT 407, or DOT 412 cargo tank in accordance with\nPlease confirm that in the calculation of the static stresses of a\n178.345-3(b), that 178.345-3(a) (2) is applicable.\nsome cases an allowable tensile strength up to 120 percent of that specified in\nThis would mean that in\nand construction of a cargo tank in accordance with Section VIlI, Division 1\neither the ASME Code or the ASTM standard may be used in the static design\nSincerely,\nDonald W. Vierimaa\nDWV/mm\nVice President-Engineering\ncc: Tank Conference Engineering Committee\n\n<<<PAGE 3>>>\n\nMAY - S 1998\nMr. Donald W. Vierimaa\nVice President-Engineering\nTruck Trailer Manufacturers Association\n1020 Princess Street\nAlexandria, VA 22314\nDear Mr. Vierimaa:\nThis is in response to your letter requesting clarification of your understanding that when\ncalculating the static stresses of non-American Society of Mechanical Engineers (ASME) Code\nstamped DOT 400 series cargo tanks in accordance with § 178.345-3(b), the requirement\nspecified in § 178.345-3(a) (2) is applicable.\nYour understanding of §§ 178.345-3(a) and (b) is correct. In cases where actual physical\nproperty tests of materials are certified showing an actual ultimate tensile strength greater than\nthat shown in the ASME Code or the American Society for Testing and Materials (ASTM)\nstandard, the ultimate tensile strength of the material used in the design may not exceed 120% of\nthe minimum ultimate strength specified in the ASME Code or the ASTM standard. Section\n178.345-3(a)(2) is applicable for the calculation of the static stresses of non-ASME DOT 400\nseries cargo tanks in accordance with §§ 178.345-3(b) and (c).\nI apologize for the delay in preparing this response and hope that it has not caused you any\ninconvenience. If you need further assistance, please contact us.\nSincerely,\nThomas G. Allan\nSenior Transportation Regulations Specialist\nOffice of Hazardous Materials Standards\nJkarim:dhm-12:68553:04/08/98\nRevised:chh: 04/29/98\nFile: 178.345-3\nSC: 333","truncated":false,"body_characters":4353}