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Title: Orifice Flow Measurement
Author: C. R. Samples
Source: 1984 Appalachian Gas Measurement Short Course
Year Published: 1984
Abstract: Escalating costs of raw materials have caused petrochemical plant management to become increasingly concerned about product accountability. This concern can only be addressed if the design engineer has the capability to evaluate measurement uncertainties of new and existing flow metering systems with which he is associated. Uncertainty is usually defined as the maximum error that could be expected with a predetermined confidence level (normally 95% or 2-standard deviation), Recognizing that the square edge orifice has been and will continue to be used extensively for process measurement and product accountability, this paper describes a computer program which has been developed for general use that determines total flow uncertainty of an orifice measurement system.

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