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Title: Effects Of Abnormal Conditions On Accuracy Of Orifice Measurement
Author: Dean Graves
Source: 1996 International School of Hydrocarbon Measurement
Year Published: 1996
Abstract: Orifice measurement has changed significantly from the days the Romans began using it in the aqueducts. The changes have been designed to improve the accuracy and ensure improved repeatability. Flow laboratories, such as Southwest Research Institute, have spent millions in developing very accurate conditions for orifice measurement. This research has proved orifice measurement is very accurate. Unfortunately, we are unable to design all measurement stations similar to the stations at the flow laboratories. Also, we cannot maintain the good, clean, dry gas used in the labs. What happens in the real world when conditions are not perfect? What are the effects of abnormalities on measurement accuracy and what can be done to eliminate or reduce these abnormalities?

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