1、AN AM E RIC A N NAT IO NAL STANDARDMeasurement of Fluid Flow in Pipes Using Orifice,Nozzle,and VenturiASME MFC-3M-2004Revision of ASME MFC-3M-1989(R1995)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further repro
2、duction or distribution is permitted.Uncontrolled when printed.ASME MFC-3M2004Revision of ASME MFC-3M1989(R1995)Measurement of Fluid Flow in Pipes UsingOrifice,Nozzle,and VenturiThree Park Avenue New York,NY 10016AN AMERICAN NATIONAL STANDARDCopyrighted material licensed to Stanford University by Th
3、omson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:August 15,2005The 2004 edition of this Standard is being issued with an automatic addenda subscription service.Theuse of addenda al
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11、written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downlo
12、aded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.vCommittee Roster .viCorrespondence With the MFC Committee .viiPart 1 General .11-1Scope and Application.11-2References and Related Documents.11-3Symbols an
13、d Definitions .21-4Principles of the Method of Measurement and Computation .51-5General Requirements for Measurement .61-6Installation Requirements .71-7Uncertainties in the Measurement of Flow Rate .9Figure1-1“Triple-T”Arrangement.6Table1-1Symbols .3Nonmandatory Appendices1AIterative Computations .
14、111BExamples of Values of Pipe Wall Uniform Equivalent Roughness,k .121CFlow Conditioners and Flow Straighteners .13Part 2 Orifice Plates.182-1Scope and Field of Application .182-2References and Related Documents.182-3Principles of the Method of Measurement and Computation .192-4Orifice Plates .192-
15、5Installation Requirements .26Figures2-1Standard Orifice Plate .192-2Orifice Plate Flatness Measurement.202-3Spacing of Pressure Taps for Orifice Plates with D and D/2 Pressure Taps or Flange Taps .222-4Corner Taps .232-5Layout Including a Full Bore Valve for?=0.6 .282-6Examples of Acceptable Instal
16、lations.302-719-Tube Bundle Flow Straightener.312-8Examples of Installations With a 19-Tube Bundle Flow Straightener Downstream of a Single Bend .332-9Zanker Flow Conditioner Plate .34Tables2-1Maximum Value of 104Ra/D.242-2Minimum Value of 104Ra/D(When Required).242-3Required Straight Lengths Between Orifice Plates and Fittings Without Flow Conditioners .27iiiCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No furt