{"operation":"document","citation":"07-0225","title":"Packaging Applications for Dangerous Goods, LLC — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2008-02-25","effective_on":null,"summary":"07-0225 response to Packaging Applications for Dangerous Goods, LLC concerning 178.275.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-07-0225.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-07-0225.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-07-0225","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2007/070225.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department\nof Transportation\nPipeline and Hazardous\nMaterials Safety\nAdministration\nFEB 2 5 2008\n1200 New Jersey Avenue, SE\nWash~ngton, D.C. 20590\nMr. David Gluntz\nPackaging Applications for Dangerous Goods, LLC\n3583 Blackbottom Court,\nColumbus, OH 4322 1-450 1\nRef. No. 07-0225\nDear Mr. Gluntz:\nThis responds to your November 28,2007 email and subsequent telephone conversations\nrequesting clarification of the general design requirements for DOT portable tanks under the\nHazardous Materials Regulations (HMR; 49 CFR Parts 17 1 - 180). Specifically, you ask\nwhether installing a \"bleed off valve\" assembly as a component of the pressure relief system\nfor a DOT 5 1 portable tank is prohibited and requires a special permit to install.\nYour enclosed sketch indicates the bleed off valve assembly would be installed between the\npressure gaugettell-tale indicator and the pressure relief device to allow for the safe removal\nof vapors trapped in the void space should a leak occur in the frangible disc.\nIt does not appear that the installation of the bleed off valve assembly involves a\nmodification of the DOT 5 1 portable tank that would invalidate the ASME U stamp.\nTherefore, the bleed off valve assembly installed as a component of the pressure relief\nsystem as shown in your sketch is not prohibited and does not require a special permit to\ninstall. However, we highly recommend the use of good engineering practices (e.g., a\nleakage test) when installing the assembly. A report of the installment and any testing must\nbe made a part of the records for the portable tank.\nI hope this information is helpful. Please contact us if you require additional assistance.\nHattie L. Mitchell\nChief, Regulatory Review and Reinvention.\nOffice of Hazardous Materials Standards\n\n<<<PAGE 2>>>\n\nPage 1 of 2\nDrakeford, Carolyn <PHMSA>\nFrom: INFOCNTR <PHMSA>\nSent: Wednesday, November 28,2007 11:51 AM\nTo: Drakeford, Carolyn <PHMSA>\nSubject: F W Letter of Interpretation - 49 CFR 178.275(9)(3)\nAttachments: 49 CFR 178-275-9-3 bleeder concept sketch spec 51 11-27-07.doc\nCarolyn,\nCould you take care of processing this as a formal request for interpretation? Thanks!\nErin\nFrom: David Gluntz [mailto:davidgluntz@padgllc.com]\nSent: Wednesday, November 28, 2007 ll:20 AM\nTo: INFOCNTR <PHMSA>\nSubject: Letter of Interpretation - 49 CFR 178.275(9)(3)\nPriority: Speedy Reply Please\nReference: 49 CFR 5 175.278(g)(3) and attached sketch with Bleed off valve concept\nDear Mr. Mazzullo,\nFirst of all, please let me apologize for asking for a speedy reply. The company proposing to transport a\nregulated material within a Specification 5 1 portable tank is under pressure from its customer for a\ndefinitive answer regarding the appropriateness of the referenced \"Bleed off' assembly (sketch item D)\nin the attached sketch. The concern is as follows: the Pressure GaugeITell-Tale Indicator (sketch item\nB) is required by 8 178.275(g)(3) to indicate if the Frangible Disc (sketch item A) leaked. Consequently,\nif there was a leak, there must be a safe way to \"bleed off' the vapors between the Frangible Disc\n(sketch item A) and the Pressure Relief Device (sketch item C) into a neutralizing agent. The \"bleed\noff' assembly (sketch item D) would permit a hose or similar type plumbing to be attached, allowing the\ntrapped material to flow into a neutralizing agent. When the \"bleed o r ' is completed and the leak\nrepaired, the \"bleed off' valve would be closed, the hose would be removed and the threaded cap\nreplaced. The hose would not be a permanent, in transport, component of the Spec 5 1. However, the\n\"bleed off valve\" assembly would be a permanent, in transport, component of the Spec 5 1 's pressure\nrelief system.\nSecond, yesterday Mr. Stan Staniszewski of the DOT'S Office of Hazardous Materials Technology and I\ndiscussed adding the \"bleed off' assembly to a Specification 5 1's pressure relief system. Mr.\nStaniszewski said that adding a \"bleed off valve\" between the frangible disc and the pressure relief\ndevice on a Specification 5 1 portable tank would be acceptable. Obviously, after the \"bleed off valve\"\nassembly were installed, a leakproofness test would.be necessary. Mr. Staniszewski also mentioned that\npossibly a special permit should be applied for before proceeding.\nThird, I have been unable to find a provision in the 49 CFR which would prohibit the permanent\ninstallation of the \"bleed off' valve assembly (sketch item D).\nFourth, Mr. Staniszewski said that if a written, DOT interpretation was needed, I was to contact your\n\n<<<PAGE 3>>>\n\nPage 2 of 2\nI\ndepartment. Therefore, 1 am asking for an interpretative letter confirming Mr. Staniszewski and my\nbelief that a \"bleed off vent'' assembly can be added to the 49 CFR 178.275(g)(3) required pressure\nrelief as sketched without violating the DOT'S regulations for a Specification 5 1 portable tank.\nAdditionally, I do not believe that a special permit is necessary as the Specification 5 1's shell is not\ndirectly being affected.\nI am looking forward to hearing from your office and I thank you in advance for your help.\nCONFIDENTIALTTY NOTICE: This email message, including any attachments, is for the sole use of the intended\nrecipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or\ndistribution is prohibited. I f you are not the intended recipient, please contact the sender by reply email and\ndestroy all copies of the original message.\nDavid C. Gluntr\nPackaging Applications for Dangerous Goods, LLC\n3583 Blackbottom Court\nColumbus, OH USA 43221-4501\nOffice (614) 529-0712\nCell (614) 425-7118\ndavidqluntz@pad~llc.~\nW W ~ D ~ ~ ~ I I C . C O ~ -\n\n<<<PAGE 4>>>\n\nDavid Gluntz, PADG, LLC, 3583 Blackbottom Court, Columbus, OH 43221\n6 1 4-529-07 1 2, davidsluntz@~adallc.com www.padallc.com\n49 CFR 5 1,78.275(g)(3) Concept Sketch - November 27,2007\nBleed off valve\nSketch has no scale and is for concept discussion~reference only.\nA = Frangible Disc\nB = Pressure GaugeITell-Tale Indicator\nC = Pressure Relief Device\nD = Thought of \"Bleed off' assembly consisting of a nipple to a valve to nipple to a threaded cap\nBody of Spec 5 1 portable tank shell","truncated":false,"body_characters":6185}