{"operation":"document","citation":"11-0311","title":"Weatherford International — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2012-02-10","effective_on":null,"summary":"11-0311 response to Weatherford International concerning 173.306.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-11-0311.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-11-0311.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-11-0311","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretations/2011/110311.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department 1200 New Jersey Avenue SE\nof Transportation Washington. DC 20590\nPipeline and Hazardous\nMaterials Safety\nAdministration\nfEB 1 0 1012\nMr. Tim Redwine\nWeatherford International\n495 Winscott Road\nFort Worth, Texas 761256\nReference No.: 11-0311\nDear Mr. Redwine:\nThis responds to your letter requesting clarification of Hazardous Materials Regulations\n(HMR; 49 CFR Parts 171-180) applicable to limited quantities of compressed gases. In\nyour incoming letter, you describe an accumulator system that functions as part of a natural\ngas or oil drilling rig. You also include a picture of this accumulator system. You ask\nwhether this accumulator system, as shown in the picture, is excepted from the HMR as\nspecified in § 173.306(f).\nThe answer is yes. In accordance with § 173.306(f)(1), provided the accumulator system is\ninstalled in either a motor vehicle, construction equipment, or assembled machinery and is\ndesigned and fabricated with a burst pressure of not less than five times their charged\npressure at 70 oF., the accumulator system would not be subject to any other requirements\nof the HMR. As described in your incoming letter and shown in the accompanying\npicture, this accumulator system meets the requirements specified in § 173.306(f)(1) and is\nexcepted from the HMR.\nI trust this satisfies your inquiry. Please contact us if we can be of further assistance.\nSincerely,\nT. Glenn Foster\nChief, Regulatory Review and Reinvention Branch\nStandards and Rulemaking Division\n\n<<<PAGE 2>>>\n\nSeptember I, 2011\n'Bene dicJ'9\nr13. 3D(o (j'fl.)\n~ til\") d~,.-s\n11-03//\nMr. Charles E. Betts\nDirector, Office of Hazardous Materi als Standards\nU.S. DOT/PHMSA (PHH- I O)\n1200 New Jersey Avenue, SE East Buildi ng, 2nd Floor\nWashington, DC 20590\nDear Mr. Betts:\nThis letter is written requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR\nPa rts 171- 180) applicable to limited quantities of com pressed gases. Will the accumulator system\npictured below be excepted from regulat ion under § 173 .306(f) ( 1). This type of equipment is to be\ntransported to an oil or natural gas site drilling rig and is used to \" shut in\" a well bore . Each cylinder\nhas a burst pressure 5 times greater than t he charged pressure @ 70 degrees. The five accumulators\npictured are plumbed into a manifold system with each cylinder pre-charged to 1000 psig.\nSincerely,\nTim Redwine\nUS DOT Compliance Coordinator\nWeatherford I nternational\n495 Winscott Rd\nFort Worth, Texas 761256\nTelephone: 817.249.7861\nEmail: tim.redwine@weatherford.com","truncated":false,"body_characters":2564}