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Title: Turbine Meter Accuracy In Air Vs. Natural Gas
Author: Winston F. Z. Lee
Source: American Gas Association 1987
Year Published: 1987
Abstract: It is very desirable to know the accuracy of a gas turbine meter that is operating in natural gas but calibrated in air. This paper presents the theory and laboratory verification test and field evaluation test data to show that a well-engineered gas turbine meter (single rotor or tandem rotors) has the same accuracy in natural gas as in air, operating at the same Reynolds number. The unique self-check and self-adjust outputs of an Auto-Adjust TUrbo-Meter are capable of determining separately the effect on meter accuracy due to different flow media (air vs. natural gas) and the effect due to different test facilities themselves. Evaluation test data of Auto-Adjust TUrbo-Meters calibrated in air at Rockwell Internationals DuBois test facility and tested in natural gas against critical flow Venturis at British Gass Bishop Auckland test facility. Natural Gas Pipelines Johet test station, and United Gass Arnaudville test station provide further evidence of verification of this conclusion.

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