# Memo: Internal — Pipeline Safety Interpretation - **operation:** document - **citation:** PI-79-005 - **title:** Memo: Internal — Pipeline Safety Interpretation - **source type:** guidance - **agency:** Pipeline and Hazardous Materials Safety Administration - **status:** guidance - **official:** true - **published on:** 1979-03-12 - **effective on:** Not available - **summary:** PI-79-005 response to Memo: Internal concerning 192.739, 192.743. - **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-79-005.json - **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-79-005.md - **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-79-005 - **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1979/PI79005.pdf **body:** <<>> March 12, 1979 Mr. George Orr Office of Pipeline Safety Department of Transportation 6622 Hornwood Drive Houston, Texas 77074 RE: 49CFR §§192.731, 192.739, 192.743 Dear Mr. Orr: Pursuant to our conversation of this afternoon, I am forwarding a copy of a letter written by Marshall W. Taylor, Chief of the Central Region, Office of Pipeline Safety, interpreting the above referenced sections of Title 49, Code of Federal Regulations. In his letter Mr. Taylor states that "the requirements of §192.731, §192.739 and §192.743 do not apply to relief devices or regulations which are not installed in a piping system or storage vessels containing gas . . ." Presumably, the Southwest Region interprets these regulations similarly; however, inasmuch as Columbia Gulf operates its pipeline system primarily in the Southwest Region and not the Central Region, please forward, at your earliest convenience, an opinion on the applicability of the above- referenced regulations to relief devices or regulators which are installed in piping systems or storage vessels not containing gas. Thank you for your cooperation in this matter. Sincerely, Kathleen O'Leary DB C:\WP51\INTERPRT\192\739\79-03-12 1 - **truncated:** false - **body characters:** 1203