GB/T 21188-2007
ActiveMeasurement of gas flow by means of critical flow Venturi nozzles
用临界流文丘里喷嘴测量气体流量
Application Summary AI generated
This standard specifies the geometry, installation, and usage requirements for critical flow Venturi nozzles used to measure gas flow rates. It is applied in industrial metrology, particularly for calibrating gas flow meters and measuring flow in pipelines where high accuracy is required, such as in natural gas distribution, chemical processing, and laboratory testing. The standard ensures consistent and reliable flow measurement under choked flow conditions, where the nozzle maintains a constant mass flow rate.
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