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Title: Effects Of Abnormal Conditions On Accuracy Of Orifice Measurement*
Author: Susan E. Mcmanus, James A. Brennan, Charles F. Sindt
Source: 1987 International School of Hydrocarbon Measurement
Year Published: 1987
Abstract: The flowrate (Qh) through an orifice meter can be calculated from the pressure (pf), temperature, differential pressure (hw) and an empirical discharge coefficient (C1) 1 by Qh - C J hw Pf (D The discharge c o e f f i c i e n t s in AGA-3 1 were e x p e r i m e n t a l l y determined in normal flow cond i t i o n s , where there there was no s w i r l , p u l s a t i o n s and the v e l o c i t y p r o f i l e was symmetric. In abnormal flow c o n d t i o n s , the discharge coe f f i c i e n t can be s i g n i f i c a n t l y d i f f e r e n t r e s u l t i n g in major e r r o r s in measurement.

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