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Title: Orifice Meter Gage Line Distortions
Author: Ray G. Durke, Robert J. Mckee
Source: 2000 International School of Hydrocarbon Measurement
Year Published: 2000
Abstract: In attempts to achieve more accurate gas flow measurements, industry is placing more emphasis on defining and avoiding adverse unsteady flow conditions. Interactions of pulsation energy and piping acoustics are being considered. Industry has put a great deal of effort into replacing relatively long gage line tubing with close-coupled, straight bore manifolds. This paper focuses on gage line effects on gas flow measurement. The term gage lines as used in this paper refers to the pressure sensing lines connecting the orifice taps to the transmitter, including valve manifolds, branch connections, and transmitter gas passage volumes. The gage line systems can cause two distorting effects which can adversely effect measurement accuracy.

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