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Title: Bi-Comparison For High Te Mperature Water Flow Between Ptb And Nmij
Author: Noriyuki Furuichi Yoshiya Terao Leopoldo Cordove Thomas Lederer
Source: 2015 International Symposium on Fluid Flow Measurement
Year Published: 2015
Abstract: Bi-comparison for high temperature water fl ow is performed between PTB and AIST, NMIJ using differential pressure meters. Flowrate range in the comparison is from 250 m 3 /h to 740 m 3 /h and temperature range is from 20 ? C to 80 ? C. Reynolds number based on the pipe diameter ranges from 4.4 ? 10 5 to 3.6 ? 10 6 . The transfer meters are a throat tap type flow nozzle based on ASME standard and an orifice with corner tap. The transfer meters are calibrated by a static gravimetric method using weighing tank in PTB and a volumetric method using prover system in AIST, NMIJ. The results of the discharge coefficient are agreed well between the labs. Especially, the results by the orifice with flow conditioner are excellently agreed. The differences of discharge coefficients given by the both labs are less than 0.03%

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