{"operation":"document","citation":"PI-94-019","title":"Public Utilities Commission of Ohio — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1994-05-02","effective_on":null,"summary":"PI-94-019 response to Public Utilities Commission of Ohio concerning 192.551.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-94-019.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-94-019.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-94-019","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1994/PI94019.pdf","body":"<<<PAGE 1>>>\n\nMay 2, 1994\nMr. Edward M. Steele\nChief, Gas Pipeline Safety Section\nThe Public Utilities Commission of Ohio\n180 E. Broad Street\nColumbus, OH 43266-0573\nDear Mr. Steele:\nI am responding to your letter of March 23, 1994, concerning the maximum allowable operating\npressure (MAOP) of pipeline in two distribution systems. Answers to your questions regarding\neach system follow.\nThe first system has an MAOP of 125 psig based on a maximum safe pressure (§§ 192.619(b)(6)\nand 192.621(a)(5)), but the system was operated at 145 psig during the 5–year period prior to\nJuly 1, 1970. Section 192.619(c) would allow a new MAOP of 145 psig if the system is now in\n“ satisfactory condition,” and the limitations on MAOP under § 192.611 (class location change)\nand § 192.621 (high-pressure distribution systems) are met. However, any increase in MAOP\nabove 125 psig must comply with the uprating requirements of Subpart K of Part 192\n(§ 192.551). Subpart K would still have to be met even if the system has been tested after\nconstruction to at least 218 psig (1.5 time 145 psig).\nThe second system has an MAOP of 5 psig based on a maximum safe pressure, but the system\nwas operated at 10 psig during the 5–year period prior to July 1, 1970. Although the system has\nbeen checked for corrosion and rid of leaks, the operator may not raise the MAOP to 10 psig\nmerely by certifying that 10 psig should have been the original MAOP. As with the first system,\nthe operator must uprate the system under Subpart K.\nSincerely,\nCesar De Leon\nDirector for Pipeline Safety\nRegulatory Programs\ndal/192.551\n94/05/02","truncated":false,"body_characters":1601}