{"operation":"document","citation":"18-0125","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":"2019-04-16","effective_on":null,"summary":"18-0125 response to Truck Trailer Manufacturers Association concerning 178.337.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-18-0125.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-18-0125.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-18-0125","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/71131/180125.pdf","body":"<<>>\n\nINTERPRETATION LETTERS\nRequester\nJohn Freiler\nDate Received:\n10/9/2018\nCompany\nTruck Trailer Manufacturers Association\nTracking\n18-0125\nPhone\n703-549-3010\nRevision Date:\n10/9/2018\nDate Assigned\n10/09/2018\nDate of Letter\n10/05/2018\nStaff\nWolcott\nFirst Draft Due:\n10/30/2018\nSection\nI First Draft Date\nSubject\nConcurrence\nStatus\nPHH-10-Specialist\nStatus Date\n10/9/2018\nSign Date\nSignor\nComment\nHBP\nCopy to Docket\nCopy to DHM-60\n\n<<>>\n\nJanuary, Ikeya CTR (PHMSA)\nFrom:\nFoster, Glenn (PHMSA)\nSent:\nTuesday, October 09, 2018 1:23 PM\nTo:\nDodd, Alice (PHMSA); January, Ikeya CTR (PHMSA)\nSubject:\nFwd: Request for Interpretation - MC-331 Shear Sections\nAttachments:\nTTMA Request for Interpretation - MC331 Shear Sections.pdf\nIncoming Interp.\nT. Glenn Foster\nChief, Regulatory Review and Reinvention\nStandards and Rulemaking Division\nOffice of Hazardous Materials Safety\nPipeline and Hazardous Materials Safety Administration\nU.S. Department of Transportation\n1200 New Jersey Avenue, S.E.\nWashington, DC 20590\n202-366-4453\nglenn.foster@dot.gov\nFrom: John Freiler \nSent: Friday, October 5, 2018 2:21:42 PM\nTo: PHMSA HM InfoCenter\nCc: PHMSA Petitions; Carrie Renuart; Jeff Sims\nSubject: Request for Interpretation - MC-331 Shear Sections\nPlease see the attached request for Interpretation regarding shear sections on MC-331 cargo tanks.\nThanks!\nJohn Freiler - Engineering Manager\nTTMA\nTRUCK TRAILER Manufactured\nTruck Trailer Manufacturers Association\nTruckTrailer.org\nSince 1941\n7001 Heritage Village Plaza\nSuite 220\nGainesville, VA 20155-3094\n703-549-3010 - Phone\n1\n\n<<>>\n\nTTMA\nRICK TRAILER Manufacturer\nTank Conference\nTTMAnet.org\nSince 1941\nAssociatio\nJeffrey M. Sims • President\n7001 Heritage Village Plaza • Suite 220 • Gainesville, VA 20155 • 703-549-3010\nOctober 5, 2018\nU.S.DOT\nPHMSA-Office of Hazardous Materials Standards\nAttn: PHH-10\nEast Building\n1200 New Jersey Ave, SE\nWashington, DC 20590\nPhmsa.hm-infocenter@dot.gov\nSubject: Request for Interpretation - MC331 Shear Sections\nDear Sirs,\nWe are requesting formal interpretation of the HMR requirements for shear sections on valves installed on MC-331\nCargo tanks.\n49CFR 178.337-10(f) requires a shear section for valves specified in subparagraphs (1) and (2) of paragraph\n(f). These valves are typically located on the bottom exterior of the tank, and the accident damage protection\nin 178.337-10 is also typically located on the bottom exterior of the tank. Does 49CFR 178.337-10(f) apply\nto valves located within a recessed well that meets accident damage protection requirements on top of an\nMC-331 Cargo Tank? May a ball valve without a shear section be used for liquid and vapor connections\nwithin a recessed well on top of an MC-331 Cargo Tank provided all other requirements are met?\nIf you have any questions at all, please feel free to contact me.\nSincerely,\nJohn Freiler\nJohn Freiler\nEngineering Manager\nCc PHMSAPetions@dot.gov\n\n<<>>\n\nof Transportation\nU.S. Department\n1200 New Jersey Avenue, SE\nWashington, DC 20590\nMaterials Safety\nPipeline and Hazardous\nAdministration\nAPR 1.6 2019\nJohn Freiler\nTruck Trailer Manufacturers Association\n7001 Heritage Village Plaza, Suite 220\nGainesville, VA 20155\nReference No. 18-0125\nDear Mr. Freiler:\nThis letter is in response to your October 5, 2018, email requesting clarification of the Hazardous\nMaterials Regulations (HMR; 49 CFR Parts 171-180) applicable to the design of MC-331 cargo\ntanks. Specifically, you ask about the requirements for shear sections on valves.\nWe have paraphrased and answered your questions as follows:\nQ1. You ask if § 178.337-10(f) applies to valves located within a recessed well that meet the\naccident damage protection requirements on top of an MC-331 cargo tank.\nAl.\nThe answer is yes. Section 178.337-10(f) still applies to valves located on the top of an\nMC-331 cargo tank that meet the requirements for accident damage protection.\nQ2.\nYou ask if a ball valve without a shear section may be used for liquid and vapor\nconnections within a recessed well on top of an MC-331 cargo tank.\nA2.\nThe answer is no. A shear section is still required. The ball valve and recessed well do\nnot except the cargo tank from the requirements for shear sections on valves.\nI hope this information is helpful. Please contact us if we can be of further assistance.\nSincerely,\ntern Poster\nT. Glenn Foster\nChief, Regulatory Review and Reinvention\nStandards and Rulemaking Division","truncated":false,"body_characters":4460}