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 pdf fileFUNDAMENTALS OF ORIFICE METER CHART RECORDERS
What is an orifice meter? The answer usually depends upon whom you are talking to. The term orifice meter is used to mean every thing from the orifice meter chart recorder to t he entire meter station. American Gas Association defines the “orifice meter” as the complete measuring uni t comprised of primary and secondary elements.

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 pdf fileDEVELOPMENT OF ORIFICE METER STANDARDS
This paper is for the purpose of reviewing how we have arrived at the orifice meter standards, what is their value and what we can expect in the future. It is of value to review this background since respect for the orifice standards (and other standards) has diminished. This can lead to real chaos for the gas industry. The last way you want to solve your measurement problems is based on personal opinions – this is the purpose of the standards, because it represents consensus data with legal standing

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 pdf fileOrifice Metering Of Natural Gas
Part 1 General Equation and Uncertainly Guidelines

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 pdf fileFlow Orifice Sizing
Beta Ratio Limits • Beta ratio β = d D = Bore P ipe ID • Change pipe size or pressure drop to stay within beta ratio range for flow meters. • Do not change pipe more than one standard pipe size. • Beta ratio limits for flow meters are (Miller Table 9.54): Flow meter β Range Square edge orifice 0.2-0.75 (design 0.7 max) Quadrant edge orifice 0.24-0.6 Venturi 0.4-0.7

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 pdf fileFUNDAMENTALS OF ORIFICE RECORDERS
The American Gas Association defines the orifice meter as the complete measuring unit consisting of a primary and a secondary measurement device. The orifice meter body, tube and orifice plate are considered the primary measuring device. This primary device is equipped with pressure taps that allow for the hook-up of a secondary device to sense the output signal of the primary orifice meter. The secondary device is some type of recorder or datalogger that allows for the recording of the events (i.e. signal levels and changes) that are created in the primary device.

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 pdf fileMass Flow meter Based on the Coriolis Principle
Principle of Operation When masses flow through a vibrating pipe, Coriolis forces arerngenerated which bend and twist the pipe. These very small pipe de-formations are measured by optimally mounted sensors and elec-tronically evaluated. Because the measured phase shift of the sensor signals is proportional to the mass flowrate, the CoriolisrnMass Flometer measures the mass flowrate in the flowmeter direct-ly. The metering principle is dependent of the density, temperature,rnviscosity, pressure and conductivity.

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 pdf fileDESIGN AND ANALYSIS OF CORIOLIS MASS FLOWMETERS
Abstract A Coriolis mass flowmeter measures mass flow directly by vibrating a fluid-conveying pipe at resonance. Design of these meters was facilitated by solving the equations of motion via the finite element method. A complex eigenvalue analysis (SOL107) was necessary due to the presence of the Coriolis force terms in the damping matrix. Performance parameters of the meter can be predicted from the complex eigenvectors and were found to match experimentally determined values to within five percent rnSince vibration occurs during Coriolis meter operation, low stress designs must be used to preclude fatigue failure.

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