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The Effects of a Short‐Radius Elbow on Electromagnetic Flowmeter Accuracy
Author(s) -
Beck Kade J.,
Weller Ryan P.,
Barfuss Steven L.,
Johnson Michael C.
Publication year - 2018
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/awwa.1055
Subject(s) - piping , flow measurement , radius , metre , bend radius , engineering , calibration , upstream (networking) , acoustics , marine engineering , mechanical engineering , structural engineering , physics , mechanics , computer science , telecommunications , computer security , quantum mechanics , astronomy , bending
This study was conducted to show the effects that a short‐radius elbow has on electromagnetic flowmeter accuracy. Previous laboratory studies have shown that non‐ideal piping affects the accuracy of electromagnetic flowmeters. The results of this study indicated that many of the meters tested did not meet their own manufacturer's specified accuracy either in straight pipe or with the required straight pipe installed upstream of the meter and downstream of a short‐radius elbow. However, nearly all meters in this study were repeatable to within ±0.55% when installed in straight pipe. The results illustrate that when a magnetic flowmeter is to be installed in either straight pipe or piping with upstream disturbances, a laboratory calibration will improve the installed accuracy of the meter.