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Title: Overpressure/System Protection In A Large Gas Distribution System
Author: David C. Hiatt, Donald E. Holtman
Source: 1999 Appalachian Gas Measurement Short Course
Year Published: 1999
Abstract: In a gas distribution system, each piece of pipe must be protected against overpressure or exceeding the maximum allowable operating pressure (MAOP) plus allowable build-up. This includes all feeder line, distribution mains and all service lines. In some cases the operating company will apply a maximum pressure to a pipeline that is less than the MAOP. Systems that have a history of corrosion problems or those that have operated for years at a lower pressure may be assigned a maximum operating pressure (MOP) that the company considers safe, and will install an overpressure device to protect from exceeding that pressure. Requirements for the design, operating, maintenance, inspection and testing of gas pipelines and their components are in the contents of Part 192, Title 49, Code of Federal Regulations. These laws come under the jurisdiction of the Department of Transportation (DOT).

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