{"operation":"document","citation":"PI-74-0144","title":"New Jersey Natural Gas Company — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1974-10-29","effective_on":null,"summary":"PI-74-0144 response to New Jersey Natural Gas Company concerning 192.321.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0144.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0144.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0144","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1974/g74-10-29_Maver_192.321-nlmx.pdf","body":"<<<PAGE 1>>>\n\nPI-74-0144\nOCT 2 9 1974\nMr. Glenn A. Maver\nNew Jersey Natural Gas Company\n601 Bangs Avenue\nAsbury Park, NJ 07712\nDear Mr. Maver:\nBy letter of July 22, 1974, you asked if the use of fiberglass vent stacks on low or high pressure relief valves would violate\n49 CFR Part 192. You further asked if Section 192.321(a) would preclude the use of plastic pipe for the same purpose.\nA fiberglass vent stack must comply with requirements in Part 192 for plastic pipe. As a pipeline material, “fiberglass\" is\nactually a thermosetting plastic material which is reinforced with fiberglass.\nThe restriction in Section 192.321(a) that plastic pipe may only be used below ground applies to pipe made from either\nthermoplastic or thermosetting material, whether reinforced with fiberglass or not. Thus, fiberglass may not be used for\nvent stacks above ground.\nWe hope that this provides a better understanding of the applicability of the Federal requirements. Thank you for your\ninterest in pipeline safety.\nSincerely,\nSIGNED\nCesar DeLeon\nJoseph C. Caldwell\nDirector\nOffice of Pipeline Safety\n\n<<<PAGE 2>>>\n\nNew Jersey Natural Gas Company\n601 Bangs Avenue\nAsbury Park, New Jersey 07712\nJuly 22, 1974\nU. S. Dept. of Transportation\nOffice of Pipeline Safety\nWashington, D.C. 20590\nDear Sirs:\nOur Company is considering installing fiberglass vent stacks on low and high pressure relief valves located\nthroughout our distribution system. Would this be in violation of any of the Sections of \"Part 192-Transportation of\nNatural and Other Gas by Pipeline: Minimum Federal Safety Standards\"?\nIf it is decided that fiberglass cannot be used in this application would Section 192.321 (a) of the above\nstandards preclude the use of plastic pipe for the same purpose?\nThank you for your help in resolving this matter.\nYours truly,\nGlenn A. Maver","truncated":false,"body_characters":1831}