{"operation":"document","citation":"14-0004","title":"HMT Associates, L.L.C. — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2014-03-19","effective_on":null,"summary":"14-0004 response to HMT Associates, L.L.C. concerning 173.302a.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-14-0004.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-14-0004.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-14-0004","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2014/140004.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department\nof Transportation\nPipeline and Hazardous\nMaterials Safety\nAdministration\n1200 New Jersey Avenue, SE\nWashington, D.C. 20590\nMAR 1 9 2014\nMs. Patricia Quinn\nHMT Associates, L.L.C.\n603 King Street, Suite 300\nAlexandria, VA 22314-3105\nRef. No. 14-0004\nDear Ms. Quinn:\nThis is in response to your January 8, 2014 email requesting clarification of the Hazardous\nMaterials Regulations (HMR; 49 CPR Parts 171-180) concerning the filling capacity of\ncylinders manufactured and used under DOT -SP 1 0788. This special permit authorizes a non-\nspecification cylinder, conforming to a specification DOT 39 cylinder, except that the\nrequirement of§ 173.302a(a)(1) is waived. Specifically, you ask if a cylinder authorized\nunder DOT SP-10788 is subject to§ 173.302a(a)(3) which limits the capacity of a DOT 39\ncylinder not to exceed 1.23 L (7 5 cubic inches) when filled with a Division 2.1 material. In\nyour letter you note that paragraph 7 of the special permit states that the cylinder's maximum\nwater capacity may not exceed 10 pounds (277 cubic inches).\nThe answer is yes. Cylinders manufactured or used under DOT-SP 10788 are subject to the\n1.23 L (75 cubic inches) limit prescribed in§ 173.302a(a)(3) when filled with a Division 2.1\nmaterial. DOT-SP 10788 provides that cylinders authorized under this special permit must\nconform to the requirements of a specification DOT 39 cylinder except that the requirement\nof§ 173 .302a( a)( 1) is waived. The maximum water capacity of 1 0 pounds (277 cubic inches)\nreferenced in paragraph 7 of the special permit is a standard requirement for DOT 39\ncylinders with a service pressure exceeding 500 p.s.i.g. and not unique to DOT -SP 10788.\nI hope this information is helpful. If you have further questions, please contact this Office.\nSincerely,\nInternational Standards Coordinator\nOffice of Hazardous Materials Standards\n\n<<<PAGE 2>>>\n\nHMT ASSOCIATES, L.L.c.\n603KINGST.\nSUITE300\nALEXANDRIA, VA223i4·3105\n703·549-0727\nFACSIMILE: 703·549·0728\nE. A. ALTEMOS\nPATRICIA A. QUINN\nWRITER'S DIRECT DIAL NUMBER\n(703) 549-0727\nJanuary 8, 2014\nMr. Charles Betts\nDirector, Office of Hazardous Materials Standards\nU.S. Department of Transportation\nPHH-10, East Building,\n1200 New Jersey Avenue, SE\nWashington, DC 20590\nDear Mr. Betts:\nRE: Request for Interpretation of 49 CFR 173.302a (a)(3)\nThis letter is to request an interpretation of the applicability ofthe requirement in\n49 CFR 173.302a (a)(3), which limits the capacity of a DOT specification 39 cylinder to\nnot to exceed 1.23 L (75 cubic inches) when filled with a Division 2.1 material, to non-\nspecification cylinders being manufactured and used under DOT special permit, DOT -SP\n10788.\nDOT -SP 10788 (copy attached) authorizes a non-specification cylinder,\nconforming to a DOT specification 39 cylinder, except as provided in the permit. The\nregulation waived in the permit is 49 CFR 173.302a (a)(l). Under paragraph 7., of\nDOT-SP 10788, the maximum water capacity of the non-specification cylinder may not\nexceed 10 lbs. (277 cubic inches). In addition, paragraph 6., authorizes Division 2.1\nflammable gases listed in 49 CFR that are authorized in DOT specification 39 cylinde1s.\nDoes the requirement in 49 CFR 173.302a (a)(3), that limits the capacity of a\nDOT specification 39 cylinder not to exceed 75 cubic inches when filled with a Division\n2.1 material, apply to the cylinders being used under DOT -SP 10788 that may be\nmanufactured up to 277 cubic inches? Are you limited under the special permit when\nfilling the non-specification cylinders with Division 2.1 materials to 75 cubic inches?\nSince the cylinders authorized by DOT-SP 10788 are not DOT specification 39\ncylinders, but rather non-specification cylinders, the applicability of 49 CFR 173.302a\n(a)(3) is not clear.\n\n<<<PAGE 3>>>\n\nHMT ASSOCIATES, L.L.C.\nMr. Charles Betts\nJanuary 8, 2014\nPage2\nPlease do not hesitate to contact me at 703-549-0727, or by e-mail to\npquinn@pipeline.com if you have any questions concerning this request.\nAttachment: DOT -SP 10788","truncated":false,"body_characters":4040}