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Metering Research Facility Program: Operational...

SKU: GRI-00/0141
Metering Research Facility Program: Operational Factors That Affect Orifice Meter Accuracy

A literature review of industry research conducted over the years to resolve sources of orifice flow metering error is presented in this report. This current body of knowledge about operational influences on orifice meter accuracy can be used to estimate the biases that result when operating conditions deviate from orifice meter standard conditions.
Document Type
Report
Report Type
Topical Report
Report Period
09/98 - 12/01
Corporate Source
Southwest Research Institute, San Antonio, TX
Sponsor
GRI, Des Plaines, IL
Pagination
82p
Product Media
PDF Download
$295.00 / Each
 
Availability: In Stock
Summary:
A literature review of industry research conducted over the years to resolve sources of orifice flow metering error is presented in this report. This current body of knowledge about operational influences on orifice meter accuracy can be used to estimate the biases that result when operating conditions deviate from orifice meter standard conditions. Experimental data are presented on biases caused by changes in orifice edge sharpness, damage to the leading edge, and plate surface roughness. Effects of liquid films and grease deposits on orifice plates and meter tubes are reviewed. Biases due to orifice plates installed backwards and warped orifice plates are also discussed. Most studies of meter tube characteristics have concerned surface roughness and its effect on the discharge coefficient. Issues related to differential pressure measurements include dynamic fluctuations at low differentials, pulsation effects and acoustic noise. The report ends with a summary chart listing and quantifying the various sources of bias. By quantifying the various effects of "off-conditions" on measurement uncertainty, the report emphasizes the importance of these factors on measurement accuracy and custody transfer.
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