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Title: Overpressure Protection Methods
Author: Craig Lam
Source: 2008 International School of Hydrocarbon Measurement
Year Published: 2008
Abstract: The natural gas industry utilizes many different types of pressure regulation equipment to control the flow of gas as it flows from systems with higher pressure ratings to systems with lower pressure ratings. In the event that the pressure control equipment fails, some form of over pressure protection is required to prevent the system with the lower pressure rating or lower MAOP (Maximum Allowable Operating Pressure) from being over pressured. There are three primary methods of over pressure protection in the natural gas industry, which are: shut-off, relief, and monitor regulation. This paper will summarize the regulations that apply to over pressure protection in the natural gas industry and examine each of the three methods, with their advantages and their disadvantages.

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