C-7M_R2001_E1987.pdf

A N A M E R I C A N N A T I O N A L S T A N D A R D Measurement of Gas Flow by Means of Critical Flow Venturi Nozzles ASMEIANSI MFC-7M-1987-.REAFFIRMED 1992 FOR CURRENT COMMITTEE PERSONNEL PLEASE SEE ASME MANUAL AS-I 1 SPONSORED AND PUBLISHED BY T H E A M E R I C A N S O C I E T Y O F M E C H A N I C A L E N G I N E E R S United Engineering Center 345 East 47th Street New York,N.Y.1001 7 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.REAFFIRMED 2001FOR CURRENT COMMITTEE PERSONNELPLEASE E-MAIL CSasme.orgDate of Issuance:May 31,1987 This Standard will be revised when the Society approves the issuance of a new edition.There will be no addenda or written interpretations of the requirements of this Standard issued to this edition.This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate.The proposed code or standard was made available for public review and comment which provides an opportunity for additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not approve,rate,or endorse any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent,nor assume any such liability.Users of a code or standard are expressly advised that determination of the validity of any such patent rights,and the risk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual volunteers.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.Copyright 0 1987 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed 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 printed.FOREWORD(This Foreword is not part of ASME/ANSI MFC-7M-1987.)This Standard was prepared by Subcommittee 2,Working Group 5,of the American So-ciety of Mechanical Engineers Committee on Measurement of Fluid Flow in Closed Con-duits.The Committee is indebted to the many engineers who contributed to this work.This Standard is intended to assist the public with the use of critical flow nozzles.Critical flow nozzles are especially suited to flow calibration work and precise flow control applica-tions.They provide a stable flow of a compressible fluid through a closed conduit,the rate of which may be determined with a high degree of accuracy.The Committee has attempted to blend the best available technical information with common practice to develop this Standard.It is as complete a specification as the Committee determined appropriate.Some latitude and variation on the application of the Standard to critical flow venturi nozzles is allowed.However,neither these liberties nor this Standard is intended to replace proper judgment in the application of critical flow venturi nozzles.This Standard was approved by the American National Standards Institute(ANSI)on February 27,1987.111 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.ASME STANDARDS COMMITTEE MFFCC Measurement of Fluid Flow in Closed Conduits(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERS R.W.Miller,Chairman W.F.2.Lee,Vice Chairman C.J.Gomez,Secrerary COMMITTEE PERSONNEL R.B.Abernethy,Pratt&Whitney Aircraft,West Palm Beach,Florida N.A.Alston,Diederich Standard Corp.,Boulder,Colorado H.P.Bean,El Paso,Texas S.R.Beitler,The Ohio State University,Columbus,Ohio M.Bradner,Foxboro,Massachusetts E.E.Buxton,St.Albans,West Virginia J.S.Castorina,Naval Ship System Engineering Station,Philadelphia,Pennsylvania G.P.Corpron,Rosemount Inc.,Eden Prairie,Minnesota C.F.Cusick,Philadelphia,Pennsylvania D.G.Darby,Dow Chemical Co.,Lake Jackson,Texas R.B.Dowdell,University of Rhode Island,Kingston,Rho