Gas pressure regulating device is a kind of important device in urban gas pipeline system,and the manufacturing process of it should be supervised by government.The relationship between production process and supervision and inspection process is clarified according to relevant rules and standards.The process of supervision and inspection is divided into five parts,namely qualification and technical document review,raw material review,welding process control,pressure and leakage test control,and factory document inspection.The key points and difficulties of each part of the process are analyzed,and suggestions of manufacturing supervision and inspection are proposed considering the actual situation.This paper provides reference for inspection institutions,supervisory institutions and manufacturing enterprises.
Gas pressure regulating devicePressure pipelineComponent assembly deviceManufacturing supervision and inspection
NETL
NSTL
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