Gas pressure control system is one of the most important technologies in natural gas pipeline project. The purpose on configuring pressure regulating system correctly is to maintain the pressure in downstream pipeline within the required limits, ensure that this pressure does not exceed the permitted level and shutdown timely when the pressure control device is fault. The combined form of gas pressure control system is various. For different combined form of gas pressure control system, Pressure set value of the safety shut-off device, monitor and working regulating device and control logic is different Many factors, including security, reliability and economy shall be considered in configuring gas control system.%天然气输气管道工程中，压力控制是关键的技术之一，调压系统除了正确配置压力控制设备之外，还要保证当调压设备出现故障时，下游管道不超压，并能进行安全切断。调压系统的配置具有多样性，不同配置的各阀门设定点以及切换方式也不尽相同，设计人员在进行配置时需综合考虑多种因素，根据实际情况选择最安全、可靠、经济的调压系统。
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