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Title: Effects Of Entrained Liquids On Orifice Measurement
Author: Josh Kinney, Richard Steven
Source: 2008 American School of Gas Measurement Technology
Year Published: 2008
Abstract: Orifice plate meters are one of the most widely used technologies in industry for gas flow metering. This is due to their relative simplicity, the extensive publicly available data sets that led to several orifice plate meter standards 1, 2, 3, and 4 and the fact that they are a relatively inexpensive method of gas metering. However, it is common in industry for gas meters to be installed in applications where the flows are actually wet gas flows, i.e., flows where there is some liquid entrainment in a predominantly gas flow. This is usually done out of economic necessity or due to the fact that the system designers were not aware at the conceptual design stage that the gas flow would have entrained liquid. Therefore, with the orifice plate meter being such a popular gas flow meter, it is by default possibly the most common wet gas flow meter. The effect of wet gas flow on an orifice plate meter configured for gas flow service is complicated. There are ongoing research programs worldwide aimed at improving the understanding of the reaction of the differential pressure meter family (of which the orifice plate meter is a member) to wet gas flow. Most of the research results are published in conference papers. However, it is not always immediately obvious to the technician in the field using an orifice plate meter with wet gas how this information can be practically applied. This paper attempts to review the current scientific knowledge from a practical users standpoint.

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