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Title: Es-Situ Gas Meter Proving
Author: V.C. Ting
Source: 1996 International School of Hydrocarbon Measurement
Year Published: 1996
Abstract: In natural gas custody and allocation measurement, the users typically installed and operated their orifice meters according to ANSFAPI 2530 (AGA 3) standard. It is not a common practice now to prove orifice meters in field operation. However, the recent revision of ANSI/API 2530. Part 1, standard for orifice meter flow measurement allows users to prove meters under operating conditions using the actual fluid with the actual orifice plate and recording system in place. The standard recognizes that when accurate measurement is required, any deviation from the standards specifications will result in a higher measurement uncertainty. In fact, recent studies have shown that meter installation effects and meter tube surface roughness operating within the standard specifications can contribute additional measurement bias errors. On-site proving of gas flow meters can be performed at field locations to calibrate out bias errors and improve overall measurement uncertainty

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