{"operation":"document","citation":"PI-74-0112","title":"Arizona Corporation Commission — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1974-05-03","effective_on":null,"summary":"PI-74-0112 response to Arizona Corporation Commission concerning 195.106.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0112.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0112.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0112","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1974/g74-05-03_Garabrant_195.106-lmx.pdf","body":"<<<PAGE 1>>>\n\nPI-74-0112\nMay 03, 1974\nMr. H. R. Garabrant\nGas Utilities Safety Engineer\nArizona Corporation Commission\n1688 West Adams\nDear Mr. Garabrant:\nThank you for your letter of April 13, 1974, asking whether the class locations prescribed in 49 CFR 192 apply to a liquefied\npetroleum gas (LPG) line since LPG is a compressed gas in liquid form.\nThe class locations in 49 CFR Part 192 were established under the Natural Gas Pipeline Safety Act of 1968 (49 USC 1671 et\nseq.) for the safety regulation of pipelines used in the transportation of compressed gases in liquid form. When these\nliquids, such as LPG, are transported by pipeline by a carrier engaged in interstate or foreign commerce, the transportation\nis covered by the regulations in 49 CFR Part 195 promulgated under the Transportation of Explosives Act (18 USC B 31 et\nseq.).\nWe trust this adequately responds to your inquiry.\nSincerely,\n/signed/\nJoseph C. Caldwell\nDirector\nOffice of Pipeline Safety\n\n<<<PAGE 2>>>\n\nApril 13, 1974\nMr. Joseph C. Caldwell\nOffice of Pipeline Safety\nDepartment of Transportation\nWashington, D. C. 20550\nDear Mr. Caldwell:\nAlthough my office is not specifically charges with approving plans of L.P.G. intra-state pipelines, I have been asked\nto comment on the proposed program for the design and construction of a six inch L.P.G. pipeline, approximately four\nmiles long in the vicinity of Phoenix.\nAs proposed this line is being built to standards DOT Title 49, Part 195, subparts C, D, E and F. and liquid petroleum\ntransportation piping systems code AISI B 31.4-1971.\nAll seems to be in order, I made a few minor suggestions concerning their specifications, however, I have one\nquestion in my mind. Part 195 does not call for class locations and since propane which is the product to be carried, in this\ncase is a compressed gas, we well as being in liquid form, would the class locations as called for in Part 192 be applicable?\nThe company involved has correctly calculated the internal design pressure at 1430 pounds, according to part 195, and it\nwill be the allowable working pressure of this pipeline. All fittings and the line will be hydrostatically tested to permit\noperation at this pressure. However, the anticipated normal working pressure will be 1,000 PSI.\nPlease advise me as soon as possible regarding the applicability of the reduction of design factor F due to class\nlocations in regard to propane or other L.P. gasses.\nSincerely,\nH. R. Garabrant\nGas Utilities Safety Engineer","truncated":false,"body_characters":2494}