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Title: Pulsation Effects On Orifice Metering, Theoeietical And Practical Aspects
Author: Robert J. Mckee
Source: 1986 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1986
Abstract: Orifice meters are the most accepted and commonly used device for industrial measurement of large volume gas flows. Supported by a long history of use, and in accordance with the many published codes and guides, orifrlces can be relied upon for gas metering If properly utilized and maintained. One well recognized problem, however. Is that pulsations or transients in the flow affect the measurement accuracy of an orifice meter. Although the potential adverse effect of pulsations is well recognized, the nature of the resulting error mechanisms, and what should be done to correct problems, has not been well publicized. Discrepancies in orifice flow measurements are often reported by operating companies and in the open literature, but the amplitude of the associated pulsations and the resultant errors are seldom measured or considered. This paper will attempt to correct this shortcoming by describing types of pulsation-induced errors and measurements that should be made to identify pulsation effects on orifice metering.

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