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Title: Effects Of Flow Conditioning On Liquid Measurement
Author: Philip D Baker
Source: 2007 International School of Hydrocarbon Measurement
Year Published: 2007
Abstract: The main objective of this paper is to provide a summary to-date of the API Liquid Turbine Meter Flow Conditioning Research Project. Insight is provided into the effects on liquid turbine meter accuracy of flow disturbances, caused by debris on strainer screens, for various upstream piping geometries and different types of flow conditioners. This research program was initiated by the API Committee on Liquid Measurement (COLM) in 2005, and continued during 2006, primarily because of several different field observations that sometimes debris on a strainer screen can cause a significant shift in the meter factor (MF) of turbine meters, which is eliminated when the debris is removed from the strainer. Turbine meter MF shifts of up to 0.25% have been observed in the field due to debris on the strainer screen, when using tube bundle type flow conditioners. The main objectives of the laboratory research program were to: (1) Try to duplicate in the laboratory the problem observed in the field (described below), using conventional tube bundle type flow conditioners, (2) determine if the new isolating and/or high performance type flow conditioners eliminated, or substantially reduced, the problem, (3) determine the magnitude of MF shift when using just 20 diameters (20D) of straight pipe as a flow conditioner, (4) determine if different meter run inlet piping geometries (i.e., a single horizontal elbow, three elbows out-ofplane and two vertical elbows in-plane) have an effect on the MF shifts obtained using the various type flow conditioners, (5) determine if different type turbine meters are affected differently by a given flow disturbance, and (6) determine if the magnitude of the meter factor shift is affected by the size of the strainer.

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