{"operation":"document","citation":"PI-76-040","title":"City of Three Rivers — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1976-07-20","effective_on":null,"summary":"PI-76-040 response to City of Three Rivers concerning 192.457.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-76-040.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-76-040.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-76-040","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1976/PI76040.pdf","body":"<<<PAGE 1>>>\n\nJuly 20, 1976\nMr. Raymond C. Black\nSuperintendent, Gas Division\nCity of Three Rivers\nP.O. Box 398\nThree Rivers, Texas 78071\nDear Mr. Black:\nYour letter of April 22, 1976, requesting a waiver from compliance with 49 CFR 192.457,\nconcerning corrosion control, is returned herewith.\nThe petition should be presented to the Texas Railroad Commission which has authority under the\nNatural Gas Pipeline Safety Act of 1968 to enforce and grant waivers from compliance with the\nFederal standards for intrastate gas pipeline facilities in Texas. Should the Commission decide to\ngrant the waiver, we will review that decision in accordance with Sec. 3(e) of the Act.\nSincerely,\nCesar DeLeon\nActing Director\nOffice of Pipeline\nSafety Operations\nEnclosure\ndal/192.457\n76-07-20.1\n1\n\n<<<PAGE 2>>>\n\nCITY OF THREE RIVERS\nApril 22, 1976\nDepartment of Transportation\nOffice of Pipe Line Safety Operation\nWashington, DC 20590\nGentlemen:\nNow comes the City of Three Rivers, an Incorporated Community, in Live Oak County, State of\nTexas, which offers the following utility service, within bounds and adjacent area: water, sewers,\ngarbage pick-up, and Natural Gas for Domestic and Industrial use, pleading that a waiver of\nregulations set forth by \"Subpart 1-Requirements for Corrosion Control\".\nThe Domestic System was constructed as a low pressure system (carring [sic] ounces of Pressure)\nconsisting mostly of bare steel pipe located in some streets, but mostly in alley ways where\npossible. This pipe has been in the ground ranging from a few years up to fifty years, and is still in\nexcellent condition. Most of the new construction consists of P.V.C. Plastic. (Low Pressure\nSystem only) The Low Pressure system is made up of 1\" through 4\" pipe.\nThere is about a mile of moderately high pressure line in the system (60 to 70 lbs.) within the City\nlimits. This for industrial use, and about a mile and one-half to five District regulators\nstrategically located to insure a balanced pressure over the entire low pressure system. The\nsystem is layed [sic] out in such a manner should anyone or more regulators fail, pressure would\nbe maintained on the system sufficiently so as not to lose [sic] the load in any area. Each\nregulator has on the downstream side an automatic relief valve to insure against over pressure.\nThe City of Three Rivers is a small town, less than 2,000 population, and no conjested [sic]\npopulation areas: Both Commercial and Domestic.\nThe public is served with diligence. No gas service is installed without giving the premices [sic] a\nthrough [sic] inspection to see that customers lines and appliances are in safe condition.\nIn case service interruption should occur in any area all meters in the affected area are closed at\nthe meter until service has been restored on City Lines. Then customer service is restored one by\none taking care that all appliances are working in a safe manner. If customer is not at home\nservice is not restored until contact has been made.\ndal/192.457\n76-07-20.1\n2\n\n<<<PAGE 3>>>\n\nFor a number of years the City has, by contract with leak detection service companies, have run\nFlame-ionization Surveys. If leaks were found, repairs were made as soon as possible after each\nsurvey. Too, if leaks were located by other means, repairs were made in like manner.\nThe City has purchased a Flame-Pack, and plan [sic] to go over the system several times each\nyear. The first survey has been completed and all leaks have been repaired or scheduled for\nrepairs shortly.\nThe City had a survey by Cathodic Protection Service, of Houston and Corpus Christi, Texas,\nconsidering the possibility of installing Cathodic Protection on the City's System.\nThe projection life of protection was for ten years. The price of the installation was completely\nout of reach. Exceeding by far the Coat [sic] of the System.\nThis, with the elevated cost of gas, it would be impossible to impose a customers rate high\nenough to pay for the Cathodic Protection and the City gate cost of gas.\nWe propse [sic] through diligent use of the Flame-Pack and other methods, with immediate repair\nof all leaks, it will not be necessary that the City of Three Rivers be required to conform to the\nrequirements set forth in \"Subpart 1-Requirements of Carrosion [sic] Control.\"\nToo, past experience has been that the City has not had a serious corrosion problem.\nTherefore, the City of Three Rivers, Texas pleads that a waiver from Cathodic Protection for its\nCity system be allowed.\nSincerely yours,\nRaymond C. Black\nSupt. Gas Division\nCity of Three Rivers\ndal/192.457\n76-07-20.1\n3\n\n<<<PAGE 4>>>\n\nThe City of Three Rivers owns and operates, (in conjunction with the City of George West, Live\nOak County, Texas) an eleven mile gas supply line connecting with Houston Pipe Line Company\nof Houston, Texas near George West, Texas. This line consists of nine miles of 3\" seamless steel\npipe and about two miles of 4\" Grade B Pipe. This line was tested when installed to 900 lbs. per\nsquare inch cold water pressure, and part to 1100 lbs. per square in.\nTen miles of this line was installed in 1946, and one mile in 1970. The one mile was to connect\nwith our present source of gas supply, Houston Pipe Line Company near George West, Texas.\nAll of this line is coated and wrapped with standard pipe line coating.\nCathodic Protection was installed on this line in 1971, and is evaluated at regular intervals, by\nCathodic Protection service of Houston and Corpus Christi, Texas.\nRaymond C. Black\nSupt. Gas Division\nCity of Three Rivers\ndal/192.457\n76-07-20.1\n4","truncated":false,"body_characters":5557}