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Title: Performance Of Coriolis Meters In Gas Flow
Author: Dr David G. Stewart
Source: 2002 International Symposium on Fluid Flow Measurement
Year Published: 2002
Abstract: Coriolis meters are used widely in the oil and process industry for metering liquids. They offer many advantages in terms of accuracy, repeatability, and relatively low sensitivity to installation effects. Coriolis meters also have the advantage that they measure the mass flowrate directly, removing the need for density calculations and corrections. Recent advances in Coriolis meter technology have meant that their use in gas flow measurement has been on the increase. Indeed, high accuracy direct measurement of the mass flow of gases is now possible. This has been reflected in interest at ISO level where TC30/SC12 are currently drafting a Standard on Coriolis meters for gas applications. Most manufacturers will calibrate these meters (intended for gas) in water and simply quote a larger uncertainty for gas measurement. However, prior to this project starting there was very little independent data to support this approach. This work was designed to investigate the performance of Coriolis meters in gas. This would provide completely independent data from which conclusions can be drawn regarding their use in gas, and also whether a water calibration is sufficient. The work featured in this paper was undertaken as part of the 1999 - 2002 Flow Programme. The Flow Programme is funded by the UK governments Department of Trade and Industry (DTI), within their National Measurement System Directorate. The Flow Programme is designed to undertake generic research in flow measurement and closely related topics. In this paper results are presented from tests on two Coriolis meters from different manufacturers. The manufacturers in question have requested that at this stage the data be presented anonymously, until the project has been completed. The estimated completion date for this project is May 2002.

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