{"operation":"document","citation":"13-0092","title":"Linde Gas North America LLC — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2013-07-01","effective_on":null,"summary":"13-0092 response to Linde Gas North America LLC concerning 180.209.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-13-0092.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-13-0092.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-13-0092","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2013/130092.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department of Transportation\nPipeline and Hazardous Materials\nSafety Administration\n1200 New Jersey Ave, S.E.\nWashington, D.C. 20590\nJUL 0 1 2013\nMr. Guy Dalton\nHead of Transport Compliance/Safety\nLinde Gas North America LLC\n13 0 Briar Hill\nPainesville, OH 44077\nRef. No.: 13-0092\nDear Mr. Dalton\nThis is in response to your April 23, 2013 letter requesting clarification of the requirements\nfor filling DOT 3A and 3AA specification cylinders under the Hazardous Materials\nRegulations (HMR; 49 CPR Parts 171-180). Specifically you asked if \"Deuterium,\ncompressed, UN1957\" may be considered as the same as \"Hydrogen, compressed, UN1 049\"\nfor the purposes of determining the requalification period in accordance with § 180.209 or\nthe eligibility to fill cylinders to 110% of the marked service pressure.\nDOT 3A or 3AA cylinders with a water capacity of 56.7 kg (125 lbs) or less used\nexclusively for the gas service specified in§ 180.209(b)(l) may be requalified every ten\nyears instead of every five years provided certain requirements are met. While\n§ 180.209(b )(1) specifies hydrogen as a permitted gas service, deuterium is not specified.\nTherefore cylinders used for deuterium must be requalified every five years.\nIn your letter, you stated that your company is a party to Special Permit 6530, which allows\nthe filling of3A, 3AA, 3AX and 3AAX cylinders with hydrogen and mixtures ofhydrogen\nwith helium or nitrogen to 110 % of the cylinder's marked service pressure. The special\npermit authorizes the transport of hydrogen and mixtures of hydrogen. Deuterium and\nmixtures of deuterium are not authorized by the special permit.\nI hope this information is helpful. If you have further questions, please do not hesitate to\ncontact this office.\nSenior Regulatory Advisor\nStandards and Rulemaking Division\n\n<<<PAGE 2>>>\n\nApril23, 2013\n130 Briar Hill\nPainesville, Ohio 44077\n440-354-5614\n440-579-0203\nguy .dalton@linde.com\nOffice of Hazardous Materials Standards\nPipeline and Hazardous Materials Safety Administration, Attn: PHH-1 0\nU.S. Department of Transportation, East Building\n1200 New Jersey Avenue, SE.\nWashington, DC 20590-0001.\nRequest for Interpretation\nDear Sir or Madame,\nLinde Gas North America LLC (Linde) is requesting interpretation and guidance regarding the use DOT 3A and 3AA\nfor the transport of Deuterium.\nBackground\nDeuterium is an isotope of Hydrogen and is filled into 3A and 3AA cylinders with less than 125lb water capacity as\npermitted by 49CFR173 .301\n49CFR180.209(b)(l) permits the requalification of such cylinders for a period often years ifthe requirements of\n180.209(b )(1 )(ii) are met. This subparagraph allows the filling of hydrogen into such cylinders tested at ten year\nintervals.\nDOT-SP6530, to which Linde Gas North America LLC holds party status allows filling of3A, 3AA, and 3AAX\ncylinders to 11 0% of the cylinder's rated service pressure and excepts the need to comply with 173 .302a(b) if all\nprovisions of the Special Permit are met..\nQuestion 1\nIs Deuterium, an isotope of Hydrogen, to be considered as hydrogen for purposes of determining allowed retest intervals\nof 3A and 3AA cylinders as authorized in 180.209(b )(1 )(ii).\nQuestion 2\nFor filling of3A, 3AA and 3AAX cylinders at pressures of 110% of the cylinder rated service pressure as allowed by\nDOT-SP5630, is Deuterium to be considered as Hydrogen. Can deuterium be filled to 110% of rated service pressure\ninto the mentioned cylinders?\nLinde Gas North America LLC\n\n<<<PAGE 3>>>\n\nA written response at your earliest convenience is appreciated.\nSincerely\nGuy Dalton\nHead of Transport Compliance/Safety\nLinde Gas North America LLC\n440-251-0303\nguy.dalton@linde.com\nLinde Gas North America LLC","truncated":false,"body_characters":3715}