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Title: Flow Measurement Using Differential Pressure: Selection Criteria
Author: James Spinney
Source: 2016 Canadian School of Hydrocarbon Measurement
Year Published: 2016
Abstract: Today there are many technologies for measuring liquid flow in process piping. As we strive to improve the control and management of our processes, we rely on improvements in the measurement of those processes keeping pace. The improvement of the measurement can come from both new and refined technologies and through a better understanding of how to best employ the technology. Each technology brings with it a particular list of factors and process conditions that can influence the measurement. For example a fluid that coats the pipe wall can cause problems for magnetic flow meters if the electrodes become coated as well. Vortex flow meters cannot measure highly viscous or low velocity fluids that cannot create the necessary vortices as the fluid flows past the shedder bar. Coriolis meters are susceptible to vibration and certain levels of air entrainment both of which can affect the phase shift of the excited single or double tubes. And extreme pressures and temperatures will limit the use of many of the available technologies.

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