ASME MFC-6M:1998 pdf download MEASUREMENT OF FLUI D FLOW I N PIPES USI NG VORTEX FLOWMETERS
1 SCOPE
This Standard:
(a) describes vortex shedding flowmeters in whichalternating vortices are shed from one or more bluffbodies installed in a closed circular conduit;
(b) describes how the frequency of the vortex pairsis a measure of the flid velocity; how volume, massand standard volume flowrate is determined; and howthe total fluid that has flowed through the meter in aspecified time interval can be measured;
(c) applies only to fluid flow that is steady or variesonly slowly with time, is considered single-phased, andwhen the closed conduit is full;
(d) provides only generic information on vortex shed-ding fowmeters, including a glossary and a set ofengineering equations useful in specifying performance(e) describes the physical components of vortex shedding flowmeters and identifies the need for inspectioncertification,and material traceability:
() addresses phenomena that may negatively affectvortex detection as well as shift the K factor, anddescribes guidelines for reducing or eliminating theirinfluences; and
(g) provides calibration guidance.
2 REFERENCES AND RELATED DOCUMENTS
Unless otherwise indicated, the latest issue of areferenced standard shall apply.
ASME MFC-IM, Glossary of Terms Used in the Measurement of Fluid Flow in PipesASME MFC-2M，Measurement Uncertainty for FluidFlow in Closed ConduitsASME MFC-7M, Measurement of Gas Flow by Meansof Critical Flow Venturi NozzlesASME MFC-9M，Measurement of Liquid Flow inClosed Conduits by Weighing MethodASME MFC-10M,Method for Establishing InstallationEffects on Flowmeters
Publisher: The American Society of Mechanical Engi-neers (ASME), Three Park Avenue, New York, NY10016-5990
ISO 4006. Measurement of Fluid Flow in Closed Conduits — Vocabulary and SymbolsISO 4185,Measurement of Fluid Flow in Closed Conduits – Weighing MethodISO 5168,Measurement of Fluid Flow — Evaluationof UncertaintyISO 7066-1， Assessment of Uncertainty in the Calibra-tion and Use of Flow Measurement Devices — Partl: Linear Calibration’RelationshipsISO 7066-2,Assessment of Uncertainty in the Calibra-tion and Use of Flow Measurement Devices — Part2: Non-Linear Calibration RelationshipsISO 8316，Measurement of Liquid Flow in ClosedConduits — Method by Collection of the Liquid ina Volumetric TankISO DIS 9368. Installations for Flowrate Measurement
by the Weighing Method — Test Methods – Partl: Static Weighing SystemsISO TR 12764.Measurement of Fluid Flow in ClosedConduits – Flowrate Measurement by Means ofVortex Shedding Flowmeters Inserted in CircularCross-Section Conduits Running FullISO DTR 12765,Measurement of Fluid Flow in ClosedConduits – Flowrate Measurement by Means ofUltrasonic Flowmeters
Publisher: International Organization for Standardization(ISO), I rue de Varemb, Case postale 56, CH-1211Gcnev 20，Switzerland
[EC PUB 359，Expressions of the Functional Perform
ance of Electronic Measuring Equipment
IEC PUB 381-I d.c, Current Transmission
IEC PUB 381-2 d.c，Voltage Transmission
IEC PUB 529，Ingress Protection Classification and
Testing ProceduresPublisher: International Electrotechnical Commission(IEC), 3 rue de Varembe,Case postale 131，CH1211 Genev 20，Switzerland
3 DEFINITIONS (See Table 1 for Symbols)
For the purposes of this Standard, the followingdefinitions are particularly useful in describing the