{"operation":"document","citation":"PI-83-0106","title":"Pipeline Safety Interpretation PI-83-0106","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1983-08-01","effective_on":null,"summary":"PI-83-0106 concerning 192.179.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-83-0106.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-83-0106.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-83-0106","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1983/g83-08-01_SCHELLENBERG_192.179-nlmx.pdf","body":"<<<PAGE 1>>>\n\nPI-83-0106\nNo. 83-8\nDate: August 1, 1983\nDEPARTMENT OF TRANSPORTATION\nRESEARCH AND SPECIAL PROGRAMS ADMINISTRATION\nMATERIALS TRANSPORTATION BUREAU\n________________________________________________________________________\nPIPELINE SAFETY REGULATORY INTERPRETATION\nNote: This pipeline safety regulatory interpretation\napplies to all operators that are subject to the\nrule under Federal or State law.\nSECTION: 192.179\nSUBJECT: Valve spacing\nFACTS: None.\nQUESTION: How far apart may sectionalizing block valves be placed on an onshore\ntransmission line being constructed in a Class 1 area?\nINTERPRETATION: Section 192.179(a)(4) provides that \"Each point on the pipeline in a\nClass 1 location must be within 10 miles of a valve.\" A spacing of not more than 20 miles\nbetween valves will result in each point on the pipeline between valves being within 10 miles\nof a valve. This allowable spacing is supported by the language of the proposed rule (35 FR\n5713; April 8, 1970) upon which §192.179 is based, which stated that \"Each sectionalizing block\nvalve on a transmission line must be installed at a spacing not to exceed 20 miles within areas\nconforming to Class 1 Location.\"\nRichard L. Beam\nAssociate Director for\nPipeline Safety Regulation\nMaterials Transportation Bureau\n\n<<<PAGE 2>>>\n\nJuly 14, 1983\nDr. Robert L. Paullin\nAssociate Director\nOffice of Operations & Enforcement\nDepartment of Transportation\n2100 2nd Street, S.W.\nWashington, DC 20590\nRE: D.O.T. Regulations Part 192.179\nDear Dr. Paullin:\nQuestions have developed on the interpretation of valve spacing under 192.179, and we\nwould like to have an official interpretation, hopefully as soon as possible. We have a pipeline\nproject going in within several weeks, and the valve spacing questions will be part of the\nproblems with that job.\nThe opening wording of 192.179 states that each transmission line must have\nsectionalizing block valves spaced as follows:\nUnder sub (4) it states that each point on the pipeline in a Class 1 location must be within\nten miles of a valve.\nA case of ambiguity exists as to whether the actual spacing between valves along a\ntransmission line should be ten, or twenty miles. As worded under (4) above, it could be\nconstrued that if one valve is within ten miles, the requirements have been met. On the other\nhand, if the opening wording of 192.179 referring to sectionalizing lock valves it could also be\nargued that each of the two valves required to sectionalize must be within ten miles of any point\non the transmission line.\nPlease provide our office with an interpretation as soon as possible, in view of our\nimminent construction work where this will be arising.\nYours truly,\nA. J. Schellenberg, P.E.\nLead Gas Engineer","truncated":false,"body_characters":2732}