{"operation":"document","citation":"PI-74-0154","title":"The Cincinnati Gas & Electric Company — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1974-12-17","effective_on":null,"summary":"PI-74-0154 response to The Cincinnati Gas & Electric Company concerning 192.753.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0154.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0154.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0154","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1974/g74-12-17_Meyers_192.753%20-%20lmxs.pdf","body":"<<<PAGE 1>>>\n\nPI-74-0154\nDecember 17, 1974\nMr. Henry R. Meyers\nManager, Engineering & Planning\nGas Department\nThe Cincinnati Gas & Electric Company\nCincinnati, OH 45201\nDear Mr. Meyers:\nIn your letter of November 18, 1974, you ask if the internal joint clamp you are considering for\nuse in sealing a 24-inch cast-iron bell and spigot joint main would be considered as a mechanical\nleak clamp as required under 49 CFR 192.753(a). As described in the enclosure to your letter,\nthis unit consists of a performed rubber boot that is designed to be installed on the inside of a\ncircumferential joint and to seal against the prepared internal surfaces on each side of the joint.\nThis boot is then locked in place by internal expansion rings. This would be considered as a\nmechanical leak clamp.\nThank you for your interest in pipeline safety.\nSincerely,\nJoseph C. Caldwell\nDirector\nOffice of Pipeline Safety\n\n<<<PAGE 2>>>\n\nNovember 18, 1974\nMr. Joseph C. Caldwell, Director\nOffice of Pipeline Safety\nDepartment of Transportation\nWashington, D. C. 20590\nDear Mr. Caldwell:\nWe are considering internal joint clamping of a 24-inch cast iron bell and spigot main\nusing the Weco process. A brochure and article describing this process is enclosed.\nPlease provide us with an interpretation of the acceptability of this method under\n192.753(a) of the Minimum Safety Standards. In our opinion, the method is acceptable because\nmetal bands press against the sealing strip on each side of the joint and fulfill the \"mechanical\nclamp\" requirement of the standard.\nMr. Don Miller, President, Miller Pipeline Corporation, 210 S. Broadway, Green Springs, Ohio,\nhas informed us that he will provide additional technical information on this process if you need\nit. The Miller Pipeline Corporation is licensed to install the Weco-Seal in the United States.\nSincerely,\nTHE CINCINNATI GAS & ELECTRIC COMPANY\nHenry R. Meyers\nManager\nEngineering & Planning\nGas Department\nNOTE: Article on \"Transmission\" attached with this letter.","truncated":false,"body_characters":2003}