Abstract:In the natural gas pipeline and trade measurement, measurement city industrial and commercial users of gas flow, often using a gas turbine flowmeter. Gas turbine flowmeter has a long history, has accumulated considerable natural gas application data is considered accurate metering, good applicability of natural gas flow measurement instruments. Due to the use of premises working conditions vary, depending on the application needs of the working pressure is generally from a few thousand to a few Pa MPa, while in China metering mechanism generally negative pressure device checks. For under different pressure conditions, data metrological characteristics of gas turbine flowmeter is still sorely lacking. Based on the availability of meter manufacturing conditions were different specifications of gas turbine flowmeter in critical flow nozzle flow device, the high-pressure flow standard device Loop test, the test was negative pressure, 0.1MPa, 0.8MPa and 2.0 MPa, thereby exploring gas turbine flowmeter metrological characteristics at different pressures, for gas turbine flowmeter design and manufacturing companies as a reference for improvement.