{"operation":"document","citation":"PI-89-014","title":"Oklahoma Corporation Commission — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1989-08-22","effective_on":null,"summary":"PI-89-014 response to Oklahoma Corporation Commission concerning 195.1.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-89-014.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-89-014.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-89-014","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1989/PI89014.pdf","body":"<<<PAGE 1>>>\n\nMr. Dennis Fothergill\nManager, Gas Pipeline Safety\nOklahoma Corporation Commission\nJim Thorpe Office Building\nOklahoma City, Oklahoma 73105\nDear Mr. Fothergill:\nYour June 29, 1989, letter asks for written confirmation of our\ninformal view that a proposed hazardous liquid pipeline would not\nbe subject to Part 195 if it is constructed in a nonrural area of\nhigh density polyethylene plastic pipe (PE 3408) and is operated at\na stress level less than 20 percent of its specified minimum yield\nstrength (SMYS).\nSection 195.1(b)(3) provides that transportation of a hazardous\nliquid through a pipeline that operates at a stress level of 20\npercent of less of SMYS is not subject to Part 195. Our opinion\nprovided to you by telephone was based on our preliminarily\ndeciding that plastic pipe operating at 20 percent or less of the\ndesign pressure using the long-term hydrostatic strength of the\nplastic pipe would be similar to the ?195.1(b)(3) exemption for\nsteel pipe. However, upon further consideration of the background\nand meaning of this intended to apply to plastic pipe. Thus, the\nproposed pipeline would be subject to the applicable requirements\nof Part 195.\nUnder ?195.7, the operator of the proposed plastic pipeline would\nhave to notify us of the intent to transport a hazardous liquid in\na pipeline that is constructed of material other than steel at\nleast 90 days before such transportation is to begin. Within that\n90 day period if we determine the proposed transportation would be\nunduly hazardous, we will order the operator not to transport the\nhazardous liquid in the manner proposed until further notice. We\nhave in fact received such a notice from Mid-Continent Pipe Line\nCompany for a gathering system in Oklahoma City and are reviewing\nthe proposed transportation.\nSincerely,\n/signed/\nJames C. Thomas\nActing Director\nOffice of Pipeline Safety\nDB\nC:\\WP51\\INTERPRT\\195\\1\\89-08-22\n1","truncated":false,"body_characters":1913}