September 2018, Vol. 245, No. 9


Natural Gas Flow Calibration Perspective

By Terry Grimley, Manager, Flow Measurement Section, Southwest Research Institute When the concept of a natural Metering Research Facility (Figure 1) was originally conceived roughly 30 years ago by the Operating Section of the American Gas Association (AGA), one of the primary goals of the facility was to improve the accuracy of flow measurement using orifice meters (and to some extent, turbine meters).  By the time the facility was actually constructed and commissioned at Southwest Research Institute, the introduction of multipath ultrasonic meters for custody transfer had begun; and within the first five years of operation of the facility, Coriolis meters for gas flow were being introduc

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