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Title: The Design, Development, And Performance Of A Multi-Viscosity Flow Calibration Facility
Author: Bobbie Griffith, Terry Cousins, Don Augenstein
Source: 2009 International Symposium on Fluid Flow Measurement
Year Published: 2009
Abstract: This paper describes the development, design and performance of a large capacity, multiviscosity, oil flow measurement facility. The facility was constructed primarily to calibrate custody transfer quality flow meters produced by Cameron. The facility can produce world class calibrations for any type of volumetric liquid meter. The facility is a pressurized circulating system that uses one of three different hydrocarbon fluids. These fluids have nominal viscosities of 1.5, 16 and 150cSt. A 10 cubic meter prover forms the calibration basis, with master metering to enable a wider range of flowrates, particularly at the high flows. The paper shows in detail the uncertainty analysis for all of the methods of calibration, as well as the process that enabled the facility to obtain both NMI certification and ISO 17025 accreditation. Two particular features of this facility are described, along with their implications. First, temperature control of better than 0.1 Deg C during calibration. This temperature control has allowed a greater understanding of flowmeters as well enabling very high quality calibrations, compared to most other available facilities. Second, the care and attention to detail with the hydraulic design allowed the facility to far exceed the proposed design flow rates, allowing a greater range of meter calibrations than in the original specification.

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