Urban natural gas gate station is an important infrastructure of urban natural gas transmission and distribution system. The station is the gas source point of the urban transmission and distribution system, and also the gas distribution station where the long distance natural gas transmission pipeline enters the urban gas pipe network. Its task is to receive the gas conveyed by the long distance natural gas transmission pipeline, and after filtration, pressure regulation, metering, odorization and distribution in the station, it is sent to the urban transmission and distribution pipe network or directly to large users.

The city gate station should have the main functions of filtration, pressure regulation, metering, temperament detection, safe release, safe cut off, automatic switch between use line and standby line, etc., and multiple safety measures should be designed to ensure the long-term, safety and stability of gas consumption under the premise of ensuring the pressure regulation and flow measurement.