# Minnesota Department of Public Safety — Pipeline Safety Interpretation - **operation:** document - **citation:** PI-92-032 - **title:** Minnesota Department of Public Safety — Pipeline Safety Interpretation - **source type:** guidance - **agency:** Pipeline and Hazardous Materials Safety Administration - **status:** guidance - **official:** true - **published on:** 1992-07-16 - **effective on:** Not available - **summary:** PI-92-032 response to Minnesota Department of Public Safety concerning 192.557. - **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-92-032.json - **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-92-032.md - **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-92-032 - **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1992/PI92032.pdf **body:** <<>> July 16, 1992 Mr. Brian E. Pierzina Senior Engineer Office of Pipeline Safety Minnesota Department of Public Safety 175 Aurora Avenue St. Paul, MN 55103-2356 Dear Mr. Pierzina: I am responding to your letter of June 29, 1992, to George W. Tenley, Jr., about the uprating requirements of Subpart K of 49 CFR Part 192. Specifically, you asked whether § 192.557(b)(6) applies only when a low pressure distribution system is uprated to a high pressure distribution system. Because § 192.557(b)(6) requires the installation of service regulators, the purpose of this regulation is to require proper pressure controls when a low pressure distribution system is uprated to a high pressure distribution system. As these regulators would already be in place on high pressure distribution systems, § 192557(b)(6) does not apply to the uprating of a high pressure distribution system. Sincerely, /signed/ Cesar De Leon Director, Regulatory Programs Office of Pipeline Safety DB C:\WP51\INTERPRT\192\557\92-07-16 1 - **truncated:** false - **body characters:** 1016