{"operation":"document","citation":"PI-80-013","title":"Missouri Public Service Commission — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1980-08-13","effective_on":null,"summary":"PI-80-013 response to Missouri Public Service Commission concerning 192.747.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-80-013.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-80-013.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-80-013","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1980/PI80013.pdf","body":"<<<PAGE 1>>>\n\nAugust 13, 1980\nMr. B. J. Washburn, Manager\nElectric and Gas Departments\nMissouri Public Service Commission\nP.O. Box 360\nJefferson City, Missouri 65102\nDear Mr. Washburn:\nThank you for your letter of June 3, 1980, in which you asked for an interpretation of Title 49 FR\n192.747.\nEnclosed is our interpretation of the specific questions you raised, i.e., are curb-cock valves\nconsidered necessary for the safe operation of a distribution system and, if so, what effect if any\ndoes the operating pressure of the service line or the presence or absence of other service line\nvalves outside of the building have on this determination.\nIf I may be of further help in this matter, please let me know.\nSincerely,\n/signed/\nMelvin A, Judah\nActing Associate Director for\nPipeline Safety Regulation\nMaterials Transportation Bureau\nEnclosure\nDB\nC:\\WP51\\INTERPRT\\192\\747\\80-08-13\n1\n\n<<<PAGE 2>>>\n\nNo. 80-11\nDate: August 13, 1980\nDEPARTMENT OF TRANSPORTATION\nRESEARCH AND SPECIAL PROGRAMS ADMINISTRATION\nMATERIALS TRANSPORTATION BUREAU\nPIPELINE\n_________________________________________________________________\nSAFETY REGULATORY INTERPRETATION\nNOTE:A\n_________________________________________________________________\npipeline safety regulator interpretation applies a particular rule to a\nparticular set of facts and circumstances, and, as such, may be relied upon\nonly by those persons to whom the interpretation is specifically addressed.\nSECTION: 192.747\nSUBJECT: FACTS: Are curb-cock valves included in those valves which may be necessary for the safe\noperation of a distribution system?\nSection 192.747 requires that each valve, the use of which may be necessary for\nthe safe operation of a distribution system, must be checked and serviced at\nintervals not exceeding one year.\nThe valves referred to in §192.747 are those necessary for the sectionalizing of the\ndistribution system so that an operator can isolate a particular section of the\ndistribution system in an emergency.\nDB\nC:\\WP51\\INTERPRT\\192\\747\\80-08-13\n2\n\n<<<PAGE 3>>>\n\nThe manual used by the Transportation Safety Institute (TSI) in conducting the\ncourse on \"Safety Regulation for Gas Pipeline Systems\" states that valves for\nsectionalizing should be considered at the following locations:\n1. 2. 3. 4. Control(s) at each pressure regulation station.\nPrincipal feed(s) to business districts and class 4 locations.\nAll single valves on mains within (2) above.\nValves that meet the following criteria.\nReasonable for a sectionalizing plan.\nConsider - number of customers\n- Volume of gas\n- environment\n- response time/valve accessibility\nA curb-cock valve could only be used to isolate the service line in which it is\ninstalled. It could not be considered as being capable of sectionalizing the\ndistribution system. Therefore, because of its limited capability, a curb-cock valve\nwould not be considered under §192.747 as being necessary for the safe operation\nof a distribution system.\nSince a curb-cock valve would not be considered necessary for the safe operation\nof a distribution system, the operating pressure of the service line or the presence\nor absence of other service line valves outside of the building would have no effect\non making a determination.\nMelvin A. Judah\nActing Associate Director for\nPipeline Safety Regulation\nMaterials Transportation Bureau\nDB\nC:\\WP51\\INTERPRT\\192\\747\\80-08-13\n3","truncated":false,"body_characters":3374}