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Title: High Pressure Services
Author: George Levesque
Source: 2009 Appalachian Gas Measurement Short Course
Year Published: 2009
Abstract: The code governing pressure control of gas delivered from high-pressure distribution systems is 192.197. This part of the code has been updated several times (11/07/1970, 07/13/1998, and 09/15/2003) since its inception on August 19, 1970. 192.197 details when overpressure protection is required and lists some acceptable methods of overpressure protection. For distribution systems with MAOPs over 125 PSIG, the code is pretty clear on the requirement for, and the application of, overpressure protection. For MAOPs below 125 PSIG, there are several factors that are looked at like the design of the service regulator, whether the gas is free from materials that could interfere with the proper operation of the regulator, the body size of the regulator, as well as other factors. For the purpose of this class, we will focus on applications above the 125 PSIG MAOP which is covered by 192.197.c.1 & 2.

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