Abstract

Coriolis mass flowmeter can directly measure mass flow, high measurement accuracy, which can be used for gas, liquid, high viscosity media and other fluids. Thus it is one of the most important directions of flow measurement. Coriolis mass flowmeters currently used in natural gas pipeline networks are usually calibrated using water. The effects of differences in the detection medium and pressure on the results are lacking in relevant studies. This article analyzes the influence of fluid pressure on the test results by statics simulation, and different pressure was carried out on the DN80 flow meter to simulate different calibration media. Then real flow calibration on several brands and models of flowmeters to compare the influence of water and natural gas respectively. The experimental results show that the error of water is less than ±0.2%, and the error of natural gas is less than ±01%. The influence brought by pressure is close to the simulation analysis, and the results of different media have good consistency.

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