{"operation":"document","citation":"04-0277","title":"Carleton Technologies, Inc. — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2005-02-07","effective_on":null,"summary":"04-0277 response to Carleton Technologies, Inc. concerning 173.306.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-04-0277.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-04-0277.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-04-0277","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2004/040277.pdf","body":"<<<PAGE 1>>>\n\nof Transportation\nU.S. Department\n400 Seventh St., S.W.\nWashington, D.C. 20590\nResearch and\npecial Program:\ndministratior\nFEB\n7 2005\nMs. Amy Vollmer\nReference No.: 04-0277\nProduct Manager - Missiles Team\nCarleton Technologies, Inc.\n10 Cobham Drive\nOrchard Park, NY 14127-4195\nDear Ms. Vollmer:\nThis is in response to your letter requesting clarification of the limited quantity exception for\n\"Helium, compressed, 2.2, UN 1046\" under the Hazardous Materials Regulations (HMR; 49 CFR\nparts 171-180). Your letter states that the helium is in cylinders with a capacity of 6.9 cubic\ninches, at a pressure of 9,200 psig.\nWhen transported by highway, § 173.306(a)(1) excepts limited quantities of certain compressed\ngases, including compressed helium, from labeling (except when intended for further\ntransportation by air) and the specification packaging requirements when packaged in containers\nof not more than 4 fluid ounces capacity (7.22 cubic inches or less). Each package must conform\nto the general requirements in §S 173.24 and 173.24a, and may not exceed 30 kg (66 pounds)\ngross weight. In addition, limited quantity shipments of compressed helium must meet all other\nrequirements in the HMR from which they have not been excepted.\nThere are no restrictions on the internal pressure when the container has a capacity of 4 ounces or\nless. However, as a guideline, it is recommended that the container has a ratio of burst pressure\nto normal operating pressure comparable to the most similar DOT specification packaging. For\npackagings not comparable to a DOT specification packaging, a ratio of burst pressure to normal\noperating pressure of five is recommended.\nFinally, if part number B45625-1 contains a hazardous material, the material must be properly\npackaged, marked and described in accordance with the applicable HMR requirements. I am\nreturning your drawings marked proprietary which were submitted to this office for review.\nI hope this satisfies your request.\nSincerely,\nHattie L. Mitchell\nChief, Regulatory Review and Reinvention\nOffice of Hazardous Materials Standards\nCoolanan\n173-306 0)()\n040277\n\n<<<PAGE 2>>>\n\nCarleton Technologies Inc\n10 Cobham Drive\nCarleton Aerosystems\nBetts\nTelephone: 716-662-0006\nOrchard Park, New York 14127-4195\nwww.carltech.com\nFax: 716-662-0747\n$173.306(()\nDecember 1, 2004\nCompressed Gusesin\nCylinders\n400 7th street SW\nU.S. Department of Transportation\n04-0217\nWashington, DC 20590-0001\nAttention:\nDirector, Office of Hazardous Material Standards\nEdward Mazzullo\nUSDOT/RSPA, DHM-10\nReference:\nRequest for Letter of Interpretation\nDear Mr Mazzullo:\nlevel) and B45749-1 (filled bottle assembly level) to ship under CFR 49 section 173.306 limited\nCarleton Aerosystems requests a letter of interpretation on p/n B45625-1 (final assembly and shipped\nquantities of compressed gas.\nThe part number in question is B45749-1 a welded cylinder 6.9 cubic inches in volume and will be\nfilled with compressed Helium, UN1046, at 9200 psi. Helium has a Hazard class of 2.2.\nhad discussed this interpretation with Transportation Regulation Specialist Helen Engrum and\nFor a product previously shipped from Carleton, John Szymanski our design/development engineer\nfrom Hattie Mitchell). This letter confirmed that our part number B44637-1 fell under section 176.306\nMechanical Engineer Mark Toughiry (reference letter dated Feb 27, 2003, reference number 03-0029\nregulations \"when in containers of not more that 4 fluid ounces capacity (7.22 cubic inches or less)...\nLimited Quantities of compressed gases section (a)(1). Section (a)(1) provides exception to most\nassembly also contains a pressurized reservoir which is less than 7.22 cubic inches in volume and\nOur request is to have a letter of interpretation for our files for our new part number B45625-1. This\ndrawings for both the top level shippable item and for the filled gas reservoir. If you require any\nwe want to confirmation that this part falls under section 176.306 section (a)(1). Enclosed are the\nadditional information please let me know. (716) 667-6482\nRegards,\n(.../\nAmy Vollmer\nvollmer@carltech.com\nProduct Manager- Missiles Team\nencl.\n- A Cobham plc company ..","truncated":false,"body_characters":4177}