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Title: 12-INCH Ultrasonic Meter Flow Verification Testing At The Mrf
Author: T. A. Grimley
Source: 1999 International Symposium on Fluid Flow Measurement
Year Published: 1999
Abstract: The results presented in this paper are a portion of a suite of flow tests proposed to verify that a meters performance is within the bounds specified in American Gas Association (A.G.A.) Report Number 9. Baseline performance of 12-inch Daniel and Instromet multipath ultrasonic meters with four types of commercially available flow conditioners is presented along with bare meter tube performance. The baseline results are used as a reference for tests involving a single 90 elbow upstream of the meter. The work was sponsored by the Gas Research Institute (GRI) and was performed at the GRI Metering Research Facility (MRF) at Southwest Research Institute. The results indicated that flow conditioners may change the bias associated with a meter, but this change was generally less than 0.2%. When either brand of meter was installed with 10D between the meter and the elbow, the results without flow conditioners showed changes in meter bias error, relative to the baseline, of less than 0.2%. This result was independent of the meter orientation relative to the elbow and as good or better than the results obtained with flow conditioners.

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