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Description / Abstract:
This Standard:
(a) describes vortex shedding flowmeters in which
alternating vortices are shed from one or more bluff bodies
installed in a closed circular conduit;
(b) describes how the frequency of the vortex pairs
is a measure of the fluid velocity; how volume, mass, and standard
volume flowrate is determined; and how the total fluid that has
flowed through the meter in a specified time interval can be
measured;
(c) applies only to fluid flow that is steady or
varies only slowly with time, is considered single-phased, and when
the closed conduit is full;
(d) provides only generic information on vortex
shedding flowmeters, including a glossary and a set of engineering
equations useful in specifying performance;
(e) describes the physical components of vortex
shedding flowmeters and identifies the need for inspection,
certification, and material traceability;
(f) addresses phenomena that may negatively affect
vortex detection, as well as shift the K factor, and describes
guidelines for reducing or eliminating their influences; and
(g) provides calibration guidance.