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Title: NEW LIQUID HYDROCARBON FLOW STANDARD FOR METER ACCURACY VERIFICATION OF CORIOLIS FLOWMETERS USED IN OIL AND GAS APPLICATION
Author: Heinz Luchsingerr Jrg Zacheres Marcel Braun Ton Leenhoven
Source: 2018 International Symposium on Fluid Flow Measurement
Year Published: 2018
Abstract: Coriolis flow meters have long been recognized to be largely immune to variable process and installation conditions when compared to other metering technologies. High viscosity fluids however do not directly follow the oscillating motion of the measuring tubes at low Re numbers. Nevertheless, some Coriolis flowmeters provide an integrated Reynolds number correction, based on its size, mass and viscosity measurement, which makes them more independent to the differences in fluid properties. The Endress+Hauser Coriolis meter has the capability to output the Reynolds number as a parameter, which enables Reynolds number based proving 1. Users are often unsure on how much Coriolis meters are influenced by the properties of the measured liquids such as viscosity. To provide performance evaluation of Coriolis meters under different viscosities, Endress+Hauser developed two high accurate calibration rigs, for two different viscosity ranges, using piston provers as reference- and Coriolis meters as working standards. Flow rates of up to 1 700 m3/h for the low and 800 m3/h for the high viscosity calibration rig are achievable. The calibration fluid is not changed, so its thermodynamic properties remain very stable. Viscosities can be set over temperature from 15 to 32 cSt (12 - 27 cP) and from 100 to 300 cSt (84 - 260 cP) respectively. This allows the evaluation of DN50 to DN400 Coriolis meters throughout the critical range of Reynolds number. This paper presents the key points of the concept.

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