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Title: Minimizing The Effects Of Pulsation Induced Gage Line Error
Author: Michael Royce Miller
Source: 1999 Appalachian Gas Measurement Short Course
Year Published: 1999
Abstract: Pulsations created by compressors, flow control valves, regulators, and some piping configurations are known to cause significant errors in gas flow measurement. In recent years the Pipeline and Compressor Research Council (PCRC), a subsidiary of the Southern Gas Association, commissioned and funded various pulsation research projects at Southwest Research Institute (SWRI) In San Antonio, Texas. This research culminated in the publication of several technical papers, including the April 1987 PCRC report 10.87-3 titled Pulsation and Transient-Induced Errors at Orifice Meter Installations and the most recent technical report An Assessment of Technology for Correcting Pulsation Induced Orifice Flow Measurement dated November, 1991. Though originally produced for PCRC members only, these reports are now available to the industry for a nominal charge. The PCRC sponsored research programs concluded that pulsation induced measurement errors fall into two broad categories 1. Primary Element Error, which includes square root averaging error (SRE), inertial errors, and shifts in the orifice coefficient. 2. Secondary Element Errors, which consist of gage line distortion and gage line shift, together commonly referred to as gage line error (GLE).

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