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Title: Flow Conditioning For Gas Measurement
Author: Blaine Sawchuk
Source: 2011 International School of Hydrocarbon Measurement
Year Published: 2011
Abstract: The most important aspects of flow measurement are the flow conditions within the pipe upstream of a meter. Flow conditions refer to: the gas velocity profile, irregularities in the profile, varying turbulence levels within the velocity or turbulence intensity profile, swirl (type I, full body rotation, Type II, complicated multiple axis rotation) and any other fluid flow characteristics which will cause the meter to register flow different than that expected. Installation effects which cause flow conditions within the pipe to vary from reference conditions are: insufficient straight pipe, exceptional pipe roughness or smoothness, elbows, valves, tees and reducers, just to name a few. Certainly, a common understanding of how these installation effects impact the meter is important since devices which create upstream installation effects are common components of any standard metering design. Flow conditioning is explained as well, and refers to the process of artificially generating a reference, fully-developed flow profile for the flow meter, and is essential to enable accurate measurement while maintaining a costcompetitive meter standard design

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