1、BSI Standards PublicationBS EN 60534-2-1:2011Industrial-process controlvalves -Part 2-1: Flow capacity Sizing equationsfor fluid flow under installed conditionsBS EN 60534-2-1:2011Incorporating corrigendum April 2015BS EN 60534-2-1:2011 BRITISH STANDARDNational forewordThis British Standard is the U
2、K implementation of EN 60534-2-1:2011. It is identical to IEC 60534-2-1:2011, incorporating corrigendum April 2015. It supersedes BS EN 60534-2-1:1999 which is withdrawn.The start and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by IEC corrigendu
3、m April 2015 is indicated in the text by .The UK participation in its preparation was entrusted by Technical Committee GEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements of systems.A list of organizations represented on this subcommittee can be obtained on request to its secretary.T
4、his publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 90345 8ICS 23.060.40; 25.040.40Compliance with a British Standard c
5、annot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2011.Amendments/corrigenda issued since publicationDate Text affected30 June 2015 Implementation of IEC corrigendum April 2015EUROPEAN S
6、TANDARD EN 60534-2-1 NORME EUROPENNE EUROPISCHE NORM May 2011 CENELEC European Committee for Electrotechnical StandardizationComit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All right
7、s of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60534-2-1:2011 E ICS 23.060.40; 25.040.40 Supersedes EN 60534-2-1:1998English version Industrial-process control valves - Part 2-1: Flow capacity - Sizing equations for fluid flow under installed condi
8、tions (IEC 60534-2-1:2011) Vannes de rgulation des processusindustriels - Partie 2-1: Capacit dcoulement - Equations de dimensionnement pourlcoulement des fluides dans lesconditions dinstallation (CEI 60534-2-1:2011) Stellventile fr die Prozessregelung - Teil 2-1: Durchflusskapazitt - Bemessungsglei
9、chungen fr Fluide unterBetriebsbedingungen (IEC 60534-2-1:2011) This European Standard was approved by CENELEC on 2011-05-04. CENELEC members are bound to complywith the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standardthe status of a national standard
10、 without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained onapplication to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any otherlan
11、guage made by translation under the responsibility of a CENELEC member into its own language and notifiedto the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,the Czech Repu
12、blic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,Spain, Sweden, Switzerland and the United Kingdom. BS EN 60534-2-1:2011EN 60534-2-1:2011 - 2 - Forew
13、ord The text of document 65B/783/FDIS, future edition 2 of IEC 60534-2-1, prepared by SC 65B, Devices changes to the non-turbulent flow corrections and means of computing results; multi-stage sizing as an Annex. Attention is drawn to the possibility that some of the elements of this document may be
14、the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2012
15、-02-04 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-05-04 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60534-2-1:2011 was approved by CENELEC as a European Standard without any modification.
16、 _ 2 BS EN 60534-2-1:2011EN 60534-2-1:2011BS EN 60534-2-1:2011- 3 - EN 60534-2-1:2011 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For
17、dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Ye
18、ar Title EN/HD Year IEC 60534-1 2005 Industrial-process control valves - Part 1: Control valve terminology and general considerations EN 60534-1 2005 IEC 60534-2-3 1997 Industrial-process control valves - Part 2-3: Flow capacity - Test procedures EN 60534-2-3 1998 3 BS EN 60534-2-1:2011EN 60534-2-1:
19、2011 2 60534-2-1 IEC:2011 CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 7 4 Symbols . 8 5 Installation 9 6 Sizing equations for incompressible fluids 10 6.1 Turbulent flow . 10 6.2 Pressure differentials 11 6.2.1 Sizing pressure differential, psizing. 11 6.2.
20、2 Choked pressure differential, pchoked. 11 6.2.3 Liquid critical pressure ratio factor, FF. 11 6.3 Non-turbulent (laminar and transitional) flow . 11 7 Sizing equations for compressible fluids . 11 7.1 General . 11 7.2 Pressure differentials 12 7.2.1 Sizing pressure drop ratio, xsizing. 12 7.2.2 Ch
21、oked pressure drop ratio, xchoked12 7.3 Specific heat ratio factor, F. 12 7.4 Expansion factor, Y . 13 7.5 Compressibility factor, Z 13 7.6 Non-turbulent (laminar and transitional) flow . 14 8 Correction factors common to both incompressible and compressible flow . 14 8.1 Piping geometry correction
22、factors 14 8.2 Estimated piping geometry factor, FP14 8.3 Estimated combined liquid pressure recovery factor and piping geometry factor with attached fittings, FLP. 15 8.4 Estimated pressure differential ratio factor with attached fittings, xTP. 16 9 Reynolds Number, ReV16 Annex A (normative) Sizing
23、 equations for non-turbulent flow 18 Annex B (normative) Sizing equations for fluid flow through multistage control valves 21 Annex C (informative) Piping factor computational considerations . 28 Annex D (informative) Engineering Data 34 Annex E (informative) Reference calculations 41 Bibliography 5
24、4 Figure 1 Reference pipe section for sizing . 10 Figure B.1 Multistage multipath trim . 23 Figure B.2 Multistage single path trim 24 Figure B.3 Disk from a continuous resistance trim The complete trim consists of a number of these disks stacked together. . 25 Figure B.4 Sectional view of continuous
25、 resistance trim with multiple flow passages having vertical undulations 25 Figure C.1 Determination of the upper limit of the flow coefficient by the iterative method . 32 BS EN 60534-2-1:2011BS EN 60534-2-1:201160534-2-1 IEC:2011 4 688910111212131313131313131414141415151616161617181820233136435612
26、2526272734 2 60534-2-1 IEC:2011 CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 7 4 Symbols . 8 5 Installation 9 6 Sizing equations for incompressible fluids 10 6.1 Turbulent flow . 10 6.2 Pressure differentials 11 6.2.1 Sizing pressure differential, psizing. 1
27、1 6.2.2 Choked pressure differential, pchoked. 11 6.2.3 Liquid critical pressure ratio factor, FF. 11 6.3 Non-turbulent (laminar and transitional) flow . 11 7 Sizing equations for compressible fluids . 11 7.1 General . 11 7.2 Pressure differentials 12 7.2.1 Sizing pressure drop ratio, xsizing. 12 7.
28、2.2 Choked pressure drop ratio, xchoked12 7.3 Specific heat ratio factor, F. 12 7.4 Expansion factor, Y . 13 7.5 Compressibility factor, Z 13 7.6 Non-turbulent (laminar and transitional) flow . 14 8 Correction factors common to both incompressible and compressible flow . 14 8.1 Piping geometry corre
29、ction factors 14 8.2 Estimated piping geometry factor, FP14 8.3 Estimated combined liquid pressure recovery factor and piping geometry factor with attached fittings, FLP. 15 8.4 Estimated pressure differential ratio factor with attached fittings, xTP. 16 9 Reynolds Number, ReV16 Annex A (normative)
30、Sizing equations for non-turbulent flow 18 Annex B (normative) Sizing equations for fluid flow through multistage control valves 21 Annex C (informative) Piping factor computational considerations . 28 Annex D (informative) Engineering Data 34 Annex E (informative) Reference calculations 41 Bibliogr
31、aphy 54 Figure 1 Reference pipe section for sizing . 10 Figure B.1 Multistage multipath trim . 23 Figure B.2 Multistage single path trim 24 Figure B.3 Disk from a continuous resistance trim The complete trim consists of a number of these disks stacked together. . 25 Figure B.4 Sectional view of cont
32、inuous resistance trim with multiple flow passages having vertical undulations 25 Figure C.1 Determination of the upper limit of the flow coefficient by the iterative method . 32 BS EN 60534-2-1:201160534-2-1 IEC:2011 3 Figure C.2 Determination of the final flow coefficient by the iterative method .
33、 33 Figure D.1 Piping geometry factors 37 Figure D.2 Pressure recovery factors . 39 Figure D.3 Liquid critical pressure ratio factor FF. 40 Table 1 Numerical constants N 17 Table B.1 Values of the stage interaction factors, k, and the reheat factors, r for multistage single and multipath control val
34、ve trim . 27 Table B.2 Values of the stage interaction factors, k, and the reheat factors, r for continuous resistance control valve trim . 27 Table C.1 Incompressible flow . 31 Table C.2 Compressible flow . 31 Table D.1 Typical values of valve style modifier Fd, liquid pressure recovery factor FLan
35、d pressure differential ratio factor xTat full rated travel a). 35 BS EN 60534-2-1:2011BS EN 60534-2-1:201160534-2-1 IEC:2011 5 35394142192929333337 4 60534-2-1 IEC:2011 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INDUSTRIAL-PROCESS CONTROL VALVES Part 2-1: Flow capacity Sizing equations for fluid f
36、low under installed conditions FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions co
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41、he technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maxi
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45、enses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Att
46、ention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60534-2-1 has been prepared by subcommittee 65B: Measurement and contr
47、ol devices, of IEC technical committee 65: Industrial-process measurement, control and automation. This second edition cancels and replaces the first edition published in 1998. This edition constitutes a technical revision. This edition includes the following significant technical changes with respe
48、ct to the previous edition: the same fundamental flow model, but changes the equation framework to simplify the use of the standard by introducing the notion of psizing; changes to the non-turbulent flow corrections and means of computing results; multi-stage sizing as an Annex. The text of this sta
49、ndard is based on the following documents: BS EN 60534-2-1:2011BS EN 60534-2-1:201160534-2-1 IEC:2011 6 4 60534-2-1 IEC:2011 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INDUSTRIAL-PROCESS CONTROL VALVES Part 2-1: Flow capacity Sizing equations for fluid flow under installed conditions FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all nat
