{"operation":"document","citation":"12-0236","title":"Dynetek Industries Ltd. — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2012-12-18","effective_on":null,"summary":"12-0236 response to Dynetek Industries Ltd. concerning 173.301, 173.302.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-12-0236.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-12-0236.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-12-0236","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretations/2012/120236.pdf","body":"<<>>\n\nU.S. Department\nof Transportation\nPipeline and Hazardous\nMaterials Safety\nAdministration\nDEC 1 8 2012\n1200 New Jersey Avenue, SE\nWashington, D.C. 20590\nMr. Stefan Frey\nHead of Service and Systems Management\nDynetek Industries Ltd.\n4410 46 Avenue SE\nCalgary, AB T2B 3N7\nCanada\nRef. No.: 12-0236\nDear Mr. Frey:\nThis is in response to your October 23, 2012 email requesting clarification of the\nrequirements for filling DOT specification cylinders under the Hazardous Materials\nRegulations (HMR; 49 CFR Parts 171-180). Specifically you asked if a cylinder may be\nfilled in excess of the marked service pressure.\nA cylinder may be filled to a pressure in excess of the marked service pressure (1) in\naccordance with§ 173.302a(b); or (2) to compensate for certain factors, such as heat of\n. compression, high ambient temperature, or changes in elevation, provided the pressure in\nthe cylinder at 21 oc (70 °F) does not exceed the marked service pressure. Except as\notherwise provided in§ 173.301a(d), the pressure in a cylinder may not exceed 5/4 times\nthe service pressure at 55 °C (131 °F).\nI hope this information is helpful. If you have further questions, please do not hesitate to\ncontact this office.\nDelmer Billings\nSenior Regulatory Advisor\nStandards and Rulemaking Division\n\n<<>>\n\nDrakeford, Carolyn (PHMSA)\nFrom: Leary, Kevin (PHMSA)\nSent:\nTo:\nSubject: Tuesday, October 23, 2012 11:10 AM\nDrakeford, Carolyn (PHMSA)\nFW: Clarification on 49 CFR\nCarolyn,\nPlease use this email as a request for a letter of interpretation.\nThanks,\nKevin\nThank you for your feedback. I would very much appreciate if you could draft a letter addressing our items of discussion for\nFrom: Stefan Frey [mailto:stefan.frey@dynetek.com]\nSent: Tuesday, October 23, 2012 10:58 AM\nTo: Leary, Kevin (PHMSA)\nSubject: RE: Clarification on 49 CFR\nHello Kevin,\nour records.\nThank you.\nBest regards,\nStefan\nStefan Frey, P.Eng.\nHead of Service and Systems Management\nDynetek Industries Ltd.\n4410 46 Avenue SE\nCalgary, AS T28 3N7\nCanada\nPhone: 403 720 0262\nCell: 403 617 6182\nFax: 403 720 0263\nFrom: Kevin.Learv@dot.gov [mailto:Kevin.Leary@dot.gov]\nSent: Monday, October 22, 2012 1:54PM\nTo: Stefan Frey\nSubject: RE: Clarification on 49 CFR\nMr. Frey,\nWe do not respond to such requests for guidance via email. I am sure you understand there is a need to ensure that we\nprovide consistent guidance and make that guidance available to others who have the same question.\n1\n\n<<>>\n\nIf you require a written statement from PHMSA for your records I would be happy to draft a letter that responds to your\nquestions (similar to the letter I previously em ailed to you via attachment).\nKevin\nFrom: Stefan Frey [mailto:stefan.frey@dynetek.com]\nSent: Monday, October 22, 2012 11:59 AM\nTo: Stefan Frey; Lynch, Tom (PHMSA); Leary, Kevin (PHMSA); Betts, Charles (PHMSA)\nSubject: RE: Clarification on 49 CFR\nHello Kevin,\nWould you be able to respond to the question below in writing so that I can document this for our records.\nThank you.\nBest regards,\nStefan\nStefan Frey, P.Eng.\nHead of Service and Systems Management\nDynetek Industries Ltd.\n4410 46 Avenue SE\nCalgary, AB T2B 3N7\nCanada\nPhone: 403 720 0262\nCell: 403 617 6182\nFax: 403 720 0263\nFrom: Stefan Frey\nSent: Friday, October 12, 2012 9:57AM\nTo: Stefan Frey; 'Tom.Lynch@dot.gov'; 'Kevin.Leary@dot.gov'; 'charles.betts@dot.gov'\nSubject: RE: Clarification on 49 CFR\nHello Kevin,\nThank you for your voice mail message. Your statement makes absolutely sense and is in line with many other pressure\nvessel standards we apply for gas storage. I would like to file that comment in my records for future reference. Could you\ntherefore please send a brief confirmation to this email to confirm the following:\n- The pressure vessel can be offered for transport as long as the settled pressure at 21 C is smaller or equal to the\nspecified service pressure of the cylinder.\nThe filling conditions are clearly outlined in your previous attachment and in 49 CFR.\nThank you for your prompt responses, it is much appreciated.\nBest regards,\nStefan\n2\n\n<<>>\n\nStefan Frey, P.Eng.\nHead of Service and Systems Management\nDynetek Industries Ltd.\n4410 46 Avenue SE\nCalgary, AB T28 3N7\nCanada\nPhone: 403 720 0262\nCell: 403 617 6182\nFax: 403 720 0263\nFrom: Stefan Frey\nSent: Thursday, October 11, 2012 12:27 PM\nTo: 'Tom.Lynch@dot.gov'; Kevin.Leary@dot.gov; charles.betts@dot.gov\nSubject: RE: Clarification on 49 CFR\nHello Kevin,\nThank you for your statement.\nI am taking out of the letter, that as long as the pressure in the tank would settle to the specified service pressure at 21 C\nthe tank is within its operating range. That means that on a day at temperatures below 21 C the pressure would have to be\nbelow the service pressure so that when the temperature rises to 21 C the service pressure would not be exceeded.\nThe statement in paragraph 4, last sentence is not clearly defined in this case; When ambient temperatures are above 21C\nthe cylinder pressure would be above the marked service pressure if filled according to the third paragraph. Therefore I\nwould think that the cylinder can be offered for transportation.\nPlease advice.\nBest regards,\nStefan\nStefan Frey, P.Eng.\nHead of Service and Systems Management\nDynetek Industries Ltd.\n4410 46 Avenue SE\nCalgary, AB T2B 3N7\nCanada\nPhone: 403 720 0262\nCell: 403 617 6182\nFax: 403 720 0263\nFrom: Tom.Lynch@dot.gov fmailto:Tom.Lynch@dot.gov]\nSent: Thursday, October 11, 2012 11:07 AM\nTo: Kevin.Leary@dot.gov; charles.betts@dot.gov; Stefan Frey\nSubject: RE: Clarification on 49 CFR\n3\n\n<<>>\n\nThanks for finding the letter of clarification\nFrom: Leary, Kevin (PHMSA)\nSent: Thursday, October 11, 2012 9:40AM\nTo: Betts, Charles (PHMSA); Lynch, Tom (PHMSA); Stefan Frey\nCc: Leary, Kevin (PHMSA)\nSubject: RE: Clarification on 49 CFR\nMr. Frey,\nI believe the attached letter adequately answers your questions. If you still have questions, please feel free to contact me.\nKevin Leary\n202-366-2944\nFrom: Betts, Charles (PHMSA)\nSent: Thursday, October 11, 2012 9:04 AM\nTo: Lynch, Tom (PHMSA); Stefan Frey\nCc: Leary, Kevin (PHMSA)\nSubject: RE: Clarification on 49 CFR\nImportance: High\nOk thanks. Kevin Leary is looking into this.\nFrom: Lynch, Tom (PHMSA)\nSent: Thursday, October 11, 2012 9:03 AM\nTo: Betts, Charles (PHMSA); Stefan Frey\nSubject: RE: Clarification on 49 CFR\nI think he ment DOT-SP 13173\nFrom: Betts, Charles (PHMSA)\nSent: Wednesday, October 10, 2012 3:43 PM\nTo: Stefan Frey\nCc: Lynch, Tom (PHMSA)\nSubject: RE: Clarification on 49 CFR\nMr. Frey-\nThank you for your inquiry. We will get back to you as soon as possible with a response.\nRegards,\nCharles\nFrom: Stefan Frey [mailto:stefan.frey@dynetek.com]\nSent: Wednesday, October 10, 2012 4:34 PM\nTo: Betts, Charles (PHMSA)\nCc: Lynch, Tom (PHMSA)\nSubject: Clarification on 49 CFR\nDear Mr. Betts,\nThis question is related to SP 17173 Dynetek Industries Ltd. And to 49CFR $173.301a.\n4\n\n<<>>\n\nDuring a fill, the pressure vessel gas temperature increases due to the heat of compression. 173.301c: the pressure in a\ncylinder at 21C may not exceed the service pressure for which the cylinder is marked. 173.301d the pressure of a\nhazardous material at 55C may not exceed 5/4 of the service pressure of the cylinder.\nCan these statements be implied to allow a pressure vessel during fill to exceed the service pressure (223 bar in case of\nour V260 model) as long as it meets the following criteria:\nPressure does not exceed 5/4 x service pressure at 55C\nAfter a fill or in operation at temperatures above 21C the pressure settles to the service pressure or smaller\npressure at the specified 21C. This could mean that the tank pressure while on a hot day (>21C) could have a\npressure of >223 bar and is not considered to be overfilled.\nDoes the design qualification testing to CFFC would have any saying into this?\nYour comments on this would be greatly appreciated.\nSincerely,\nStefan Frey, P.Eng.\nHead of Service and Systems Management\nDynetek Industries Ltd.\n4410 46 Avenue SE\nCalgary, AB T2B 3N7\nCanada\nPhone: 403 720 0262\nCell: 403 617 6182\nFax: 403 720 0263\n5","truncated":false,"body_characters":8099}