{"operation":"document","citation":"15-0049","title":"Thompson Tank, Inc. — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2015-07-17","effective_on":null,"summary":"15-0049 response to Thompson Tank, Inc. concerning 178.320, 178.345.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-15-0049.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-15-0049.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-15-0049","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2015/150049.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department of Transportation\nPipeline and Hazardous Materials\nWashington, DC 20590\n1200 New Jersey Avenue, SE\nSafety Administration\nJUL 1 7 2015\nMr. David L. Thompson\nThompson Tank, Inc.\nP.O. Box 790\nLakewood, CA 90714-0790\nRef No.: 15-0049\nDear Mr. Thompson:\nThis is a response to your January 15, 2015 email requesting clarification of the Hazardous\nMaterials Regulations (HMR; 49 CFR Parts 171-180) with regard to the manufacture of\nDOT specification cargo tanks. Specifically you ask if accident damage protection devices\nspecified in § 178.345-8 (applicable to DOT 406, DOT 407 and DOT 412 cargo tanks) are\nconsidered an appurtenance or a structural support member.\nAn accident damage protection device meets the definition of an appurtenance as defined\nin §§ 178.320 and 178.345-1. An accident damage protection device does not itself have\nlading retention or containment function and provides no structural support to the cargo\ntank. Accident damage protection devices if required for DOT 406, DOT 407 and DOT\n412 cargo tanks must be attached to the cargo tank in accordance with the requirements of\n§ 178.345-8(a)(3). Accident induced stresses resulting from the appropriate accident\ndamage protection device requirements in combination with the stresses from the cargo\ntank operating at the MAWP may not result in a cargo tank wall stress greater than the\nultimate strength of the material of construction using a safety factor of 1.3.\nI trust this information is helpful. If you have further questions, please do not hesitate to\ncontact this office.\nSincerely,\nI came 1771\nDuane A. Pfund\nInternational Standards Coordinator\nStandards and Rulemaking Division\n\n<<<PAGE 2>>>\n\n51T8,34E 81a)()(3)\nicadent damage proliste\nDodd, Alice (PHMSA)\n15-0049\nFrom:\nCiccarone, Michael CTR (PHMSA)\nSent:\nThursday, March 12, 2015 3:00 PM\nTo:\nSubject:\nHazmat Interps\nFW: Request for interpretation - Roll Over Guards.\nShante/Alice,\nI'm not seeing this one either.\nFrom: Ciccarone, Michael CTR (PHMSA)\nTo: Hazmat Interps\nSent: Thursday, January 15, 2015 12:52 PM\nSubject: FW: Request for interpretation - Roll Over Guards.\nShante/Alice,\nPlease submit this for a formal letter of interpretation.\nThanks,\nMike\nFrom: D.L. Thompson [mailto:dlthompson@thompsontank.com]\nTo: PHMSA HM InfoCenter\nSent: Thursday, January 15, 2015 12:21 PM\nSubject: Request for interpretation - Roll Over Guards.\nGentlemen\nQ1. Are the Accident Damage Protection Devices or Roll Over Guards specified in DOT 178.348-8 considered to be an\nAppurtenance / Attachment or a Structural Support Member. DOT 178.345-8 (a) (1) (3) requires that the accident\ninduced stresses transferred to the tank shell with the tank operating at the MAWP be considered.\nNote: ASME considers these guards or devices to be an attachment and also requires that these stresses be considered.\nThank you for your consideration.\nDavid L Thompson\nThompson Tank, Inc.\nPO Box 790 Lakewood, CA. 90714\n8029 Phlox Street, Downey, CA 90241\nPhone 562-869-7711 Fax 562-869-7214\nToll Free 800-421-7545\n1","truncated":false,"body_characters":3045}