# New Jersey Natural Gas Company — Pipeline Safety Interpretation - **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:** Not available - **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:** <<>> PI-74-0144 OCT 2 9 1974 Mr. Glenn A. Maver New Jersey Natural Gas Company 601 Bangs Avenue Asbury Park, NJ 07712 Dear Mr. Maver: By letter of July 22, 1974, you asked if the use of fiberglass vent stacks on low or high pressure relief valves would violate 49 CFR Part 192. You further asked if Section 192.321(a) would preclude the use of plastic pipe for the same purpose. A fiberglass vent stack must comply with requirements in Part 192 for plastic pipe. As a pipeline material, “fiberglass" is actually a thermosetting plastic material which is reinforced with fiberglass. The restriction in Section 192.321(a) that plastic pipe may only be used below ground applies to pipe made from either thermoplastic or thermosetting material, whether reinforced with fiberglass or not. Thus, fiberglass may not be used for vent stacks above ground. We hope that this provides a better understanding of the applicability of the Federal requirements. Thank you for your interest in pipeline safety. Sincerely, SIGNED Cesar DeLeon Joseph C. Caldwell Director Office of Pipeline Safety <<>> New Jersey Natural Gas Company 601 Bangs Avenue Asbury Park, New Jersey 07712 July 22, 1974 U. S. Dept. of Transportation Office of Pipeline Safety Washington, D.C. 20590 Dear Sirs: Our Company is considering installing fiberglass vent stacks on low and high pressure relief valves located throughout our distribution system. Would this be in violation of any of the Sections of "Part 192-Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards"? If it is decided that fiberglass cannot be used in this application would Section 192.321 (a) of the above standards preclude the use of plastic pipe for the same purpose? Thank you for your help in resolving this matter. Yours truly, Glenn A. Maver - **truncated:** false - **body characters:** 1831