Turbine flowmeters the choice for maintenance, verification
Sun Pipeline Co. operates as a common-carrier transporter of crude oil, gasoline, home heating oil, diesel fuel, and petrochemicals which are produced and marketed by Sun and several other energy companies. Flow measurement accuracy is crucial to Sun`s ability to adequately service pipeline customers. Sun Pipeline Co. has developed four K factors based on specific service liquids. The four K`s allow them to correct for a specific product`s K factor rather than use less accurate linearizing techniques. The K-factor is the number of output pulses the flowmeter produces per engineering unit of volume throughput. Linear range is the flow range over which the K-factor is constant with the specified limits of linearity. Linearity, the maximum percentage deviation from the K-factor, is stated as a percentage of reading. The repeatability of a flowmeter, the allowable percentage deviation from the stated K-factor, is a measure of the stability of the output under a given set of flow conditions. Repeatability errors of turbine flowmeters are many times smaller than linearity errors. Much greater accuracy is achieved by eliminating dependency of the K-factor by using external linearizing devices.
- OSTI ID:
- 390302
- Journal Information:
- Pipeline and Gas Journal, Vol. 223, Issue 7; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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