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Title: Effect Of Meter Run Roughness On Orifice Meter Accuracy
Author: W. Studzinski, D. Berg, D. Bell, L. Karwacki
Source: 1990 International Symposium on Fluid Flow Measurement
Year Published: 1990
Abstract: Meter run roughness has an influence on the velocity profile and the orifice meter readings. The main objective of this paper is to investigate the effects of surface roughness in industrial installations of orifice meters. Therefore, industrial quality pipes, flanges, and orifice fittings have been used for the testing at high pressure natural gas. Different surface finish of these elements can result in step changes of surface roughness and results indicate various responses of the velocity profile to these changes. Particularly important is a sudden increase in surface roughness upstream of the orifice plate. Even a 1.5D long piece of rougher pipe can change the orifice readings over 1% at the large orifice diameter ratio.

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