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Title: Overpressure Protection Devices And Design Consideration!
Author: Jay W. Brandl
Source: 1993 Western Gas Measurement Short Course
Year Published: 1993
Abstract: A regulator is a mechanical device. With any mechanicai device there is the possibility of failure. The automatic Pressure Control Valve (PCV) has evolved over the years from simple weight loaded regulatoss to sophisticated control valve/actuator/feed back loop systems. As their complextty increases, so does the chance that something will malfunciion. The two PCV failure modes that should be considered when designing any facility are fully closed and wide open. The first type of failure causes an under-pressure situation. This can be avoided by incorporating a redundant feed into the design of the station. The wide open type of failure can cause the downstream system to exceed its Maximum Allowable Operating Pressure (MAOP).

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