{"operation":"document","citation":"PI-74-0142","title":"Tennessee Public Service Commission — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1974-10-21","effective_on":null,"summary":"PI-74-0142 response to Tennessee Public Service Commission concerning 192.197.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0142.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0142.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0142","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1974/g74-10-21_SEARCY_192.197-nlmx.pdf","body":"<<<PAGE 1>>>\n\nPI-74-0142\nMr. John Searcy\nEngineering Division\nTennessee Public Service Commission\nCordell Hull Building\nNashville, TN 37219\nDear Mr. Searcy:\nYour letter of September 23, 1974, asked two questions concerning Part 192 Section 192.197,\nControl of the pressure of gas delivered from high-pressure distribution systems. In response to\nthese we offer the following:\n(1) Question: Where an industrial customer requires and receives a minimum of 10 psi,\nreduces this with his own regulators within his plant to 5 psi at each piece of utilization\nequipment, is 10 psi or 5 psi considered the safe gas utilization equipment pressure as referred to\nin 192.197(b)?\nAnswer: The safe utilization pressure in such a case would be 10 psi and the individual\nregulators provided by the consumer would be considered similar to appliance regulators that are\noften used on domestic appliances.\n(2) Question: If a maximum allowable operating pressure is 50 psi and a service regulator\nthat does not have all of the characteristics listed in 192.197(a) is used to provide the 10 psi\ndescribed above, is it a correct interpretation that, in accordance with 192.197(b), suitable\nprotective devices must be installed?\nAnswer: The condition described would fall within the requirements of 192.197(b) and\nthus an additional suitable protective device would be required for the gas operator to comply\nwith this section.\nThank you for your interest in pipeline safety.\nSincerely\n/signed/\nJoseph C. Caldwell\nDirector\nOffice of Pipeline Safety\n\n<<<PAGE 2>>>\n\nMr. Joseph C. Caldwell, Director\nOffice of Pipeline Safety\nDepartment of Transportation\n2100 Second Street, SW\nWashington, D. C. 20590\nDear Mr. Caldwell:\nWhere an industrial customer requires and receives a minimum of 10 psi, reduces this with his\nown regulators within his plant to 5 psi at each piece of utilization equipment, is 10 psi or 5 psi\nconsidered the safe gas utilization equipment pressure as referred to on 192.197(b)?\nIf a maximum allowable operating pressure is 50 psi and a service regulator that does not have all\nof the characteristics listed in 192.197(a) is used to provide the 10 psi described above, is it a\ncorrect interpretation that, in accordance with 192.197(b), suitable protective devices must be\ninstalled?\nSincerely,\nJohn Searcy\nEngineering Division","truncated":false,"body_characters":2324}