1、AN AMERICAN NATIONAL STANDARDASME MFC-14M2003(Revision of ASME MFC-14M2001)AN AMERICAN NATIONAL STANDARDASME MFC-14M2003(Revision of ASME MFC-14M2001)MEASUREMENT 0FFLUID FLOW USINGSMALL BOREPRECISIONORIFICE METERSMEASUREMENT 0FFLUID FLOW USINGSMALL BOREPRECISIONORIFICE METERSCopyrighted material lic
2、ensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ANAMERICANNATIONALSTANDARDMEASUREMENTOFFLUIDFLOWUSINGSMALLBOREPRECISIONORIFICEMETERSASMEMFC-14M2003(RevisionofASME
3、MFC-14M2001)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:April 17,2003This Standard will be revised when the Society a
4、pproves the issuance of a new edition.There willbe no addenda issued to this edition.ASME will issue written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME Web site under the Committee Pages at http:/www.asme.org/codes/a
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11、0Copyright 2003 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when
12、printed.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the MFC Committee.vi1Scope and Field of Application.12References and Related Documents.13Symbols and Definitions.14Principle of Measurement and Method of Computation.75General Measurement Requirements.96Installation Requirements.97Disc
13、harge Coefficient and Empirical Equations.148Uncertainties.169Pressure Loss,?(h).17Figures1Standard Orifice Plate.112Corner Tap Geometry.133Location for Orifice Flange Pressure Taps.144Honed Small Bore Orifice Flow Section With Corner Taps.15Tables1Symbols.22Minimum Recommended Upstream Straight Len
14、gth Required to Achieve anUncertainty of 0.75%.10iiiCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORDBefore the publication of this
15、 Standard,there was no standard covering the measurementsof fluid flows using small bore precision orifice meters(nominal line sizes of14in.through 112in.)using differential pressure devices.Most people have used ASME fluid meters for guidanceor obtained information from the manufacturers of proprie
16、tary devices.This Standard has been prepared by the ASME Committee on Measurement of Fluid Flows inClosed Conduit(MFC).Suggestions for improvement of this Standard should be sent to:Secretary,MFC,The AmericanSociety of Mechanical Engineers,Three Park Avenue,New York,NY 10016.This Standard was approved as an American National Standard on February 26,2003.ivCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further
