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Title: Turbine Meter Test Results - Close Coupling
Author: Edgar B. Bowles, Jr., Darin L. George, Marybeth Nored
Source: American Gas Association 2002
Year Published: 2002
Abstract: In support of the planned revision of American Gas Association (AGA) Report No. 7, commercial turbine flow meters were recently tested in the Low Pressure Loop (LPL) at the Gas Technology Institute (GTI) Metering Research Facility (MRF). This paper presents the results of tests of four commerciallyavailable turbine meters tested in three installation configurations referenced in the current AGA-7 - the recommended meter run configuration, the close-coupled configuration, and the short-coupled configuration. The test meters included high-capacity meters and singlerotor and dual-rotor designs. Results were compared to determine the relative measurement biases of the test meters in these three different piping arrangements. Meters were also tested with a straight length of pipe installed upstream and with the ISO 9951 high-level perturbation piping immediately upstream of the meter runs, to evaluate meter performance in the presence of asymmetric, high swirl flows. The data are presented from the perspective of proposed revisions to the AGA-7 guidelines.

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