EN ISO 5167-5-2016 en Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 5 Cone meters《通过压差装置安装在圆形截.pdf

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1、BSI Standards PublicationBS EN ISO 5167-5:2016Measurement of fluid flow bymeans of pressure differentialdevices inserted in circularcross-section conduits runningfullPart 5: Cone metersBS EN ISO 5167-5:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO5167

2、-5:2016. The UK participation in its preparation was entrusted to TechnicalCommittee CPI/30/2, Differential pressure methods.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a

3、contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 81369 6ICS 17.120.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the a

4、uthority of theStandards Policy and Strategy Committee on 30 April 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 5167-5 March 2016 ICS 17.120.10 English Version Measurement of fluid flow by means of pressure di

5、fferential devices inserted in circular cross-section conduits running full - Part 5: Cone meters (ISO 5167-5:2016) Mesure de dbit des fluides au moyen dappareils dprimognes insrs dans des conduites en charge de section circulaire - Partie 5: Cnes de mesure (ISO 5167-5:2016) Durchflussmessung von Fl

6、uiden mit Drosselgerten in voll durchstrmten Leitungen mit Kreisquerschnitt - Teil 5: Konus-Durchflussmesser (ISO 5167-5:2016) This European Standard was approved by CEN on 4 February 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for g

7、iving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three o

8、fficial versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies

9、 of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spai

10、n, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide

11、for CEN national Members. Ref. No. EN ISO 5167-5:2016 EBS EN ISO 5167-5:2016EN ISO 5167-5:2016 (E) 3 European foreword This document (EN ISO 5167-5:2016) has been prepared by Technical Committee ISO/TC 30 “Measurement of fluid flow in closed conduits“. This European Standard shall be given the statu

12、s of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016. Attention is drawn to the possibility that some of the elements of this document may be the

13、subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium

14、, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerla

15、nd, Turkey and the United Kingdom. Endorsement notice The text of ISO 5167-5:2016 has been approved by CEN as EN ISO 5167-5:2016 without any modification. BS EN ISO 5167-5:2016ISO 5167-5:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principles of the

16、 method of measurement and computation 25 Cone meters . 35.1 Field of application 35.2 General shape . 45.3 Material and manufacture . 75.4 Pressure tappings . 85.5 Discharge coefficient, C .85.5.1 Limits of use . 85.5.2 Discharge coefficient of the cone meter 85.6 Expansibility (expansion) factor,

17、95.7 Uncertainty of the discharge coefficient, C 95.8 Uncertainty of the expansibility (expansion) factor, .95.9 Pressure loss . 96 Installation requirements106.1 General 106.2 Minimum upstream and downstream straight lengths for installations between various fittings and the cone meter . 106.2.1 Ge

18、neral. 106.2.2 Single 90 bend .116.2.3 Two 90 bends in perpendicular planes .116.2.4 Concentric expander .116.2.5 Partially closed valves 116.3 Additional specific installation requirements for cone meters 116.3.1 Circularity and cylindricality of the pipe .116.3.2 Roughness of the upstream and down

19、stream pipe 116.3.3 Positioning of a thermowell 117 Flow calibration of cone meters 127.1 General 127.2 Test facility . 127.3 Meter installation. 127.4 Design of the test programme . 127.5 Reporting the calibration results . 137.6 Uncertainty analysis of the calibration . 137.6.1 General. 137.6.2 Un

20、certainty of the test facility . 137.6.3 Uncertainty of the cone meter 13Annex A (informative) Table of expansibility (expansion) factor .14Bibliography .15 ISO 2016 All rights reserved iiiContents PageBS EN ISO 5167-5:2016ISO 5167-5:2016(E)ForewordISO (the International Organization for Standardiza

21、tion) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be

22、represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to

23、develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the

24、 ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified duri

25、ng the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the mean

26、ing of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 30,

27、Measurement of fluid flow in closed conduits, Subcommittee SC 2, Pressure differential devices.The first edition of ISO 5167-5 is complementary to ISO 5167-1, ISO 5167-2, ISO 5167-3, and ISO 5167-4.ISO 5167 consists of the following parts, under the general title Measurement of fluid flow by means o

28、f pressure differential devices inserted in circular cross-section conduits running full: Part 1: General principles and requirements Part 2: Orifice plates Part 3: Nozzles and Venturi nozzles Part 4: Venturi tubes Part 5: Cone metersiv ISO 2016 All rights reservedBS EN ISO 5167-5:2016ISO 5167-5:201

29、6(E)IntroductionThis International Standard, divided into five parts, covers the geometry and method of use (installation and operating conditions) of orifice plates, nozzles, Venturi tubes, and cone meters when they are inserted in a conduit running full to determine the flow rate of the fluid in t

30、he conduit. It also gives necessary information for calculating the flow rate and its associated uncertainty.This International Standard is applicable only to pressure differential devices in which the flow remains subsonic throughout the measuring section and where the fluid can be considered as si

31、ngle-phase, but it is not applicable to the measurement of pulsating flow. Furthermore, each of these devices can only be used within specified limits of pipe size and Reynolds number.This International Standard deals with devices for which direct calibration experiments have been made sufficient in

32、 number, spread, and quality to enable coherent systems of application to be based on their results and coefficients to be given with certain predictable limits of uncertainty. However, for cone meters calibrated in accordance with Clause 7, a wider range of pipe size, , and Reynolds number may be c

33、onsidered.The devices introduced into the pipe are called “primary devices”. The term primary device also includes the pressure tappings. All other instruments or devices required for the measurement are known as “secondary devices”. This International Standard covers primary devices; secondary devi

34、ces15will be mentioned only occasionally.This International Standard is divided into the following five parts:a) ISO 5167-1 gives general terms and definitions, symbols, principles, and requirements as wellas methods of measurement and uncertainty that are to be used in conjunction with ISO 5167-1,I

35、SO 5167-2, ISO 5167-3, ISO 5167-4, and ISO 5167-5.b) ISO 5167-2 specifies requirements for orifice plates, which can be used with corner pressuretappings, D and D/2 pressure tappings1), and flange pressure tappings.c) ISO 5167-3 specifies requirements for ISA 1932 nozzles2), long radius nozzles, and

36、 Venturi nozzles,which differ in shape and in the position of the pressure tappings.d) ISO 5167-4 specifies requirements for classical Venturi tubes3).e) This part of ISO 5167 specifies requirements for cone meters and includes a section on calibration.Aspects of safety are not dealt with in ISO 516

37、7 (all parts). It is the responsibility of the user to ensure that the system meets applicable safety regulations.1) Orifice plates with vena contracta pressure tappings are not considered in ISO 5167 (all parts).2) ISA is the abbreviation for the International Federation of the National Standardizi

38、ng Associations, which wassucceeded by ISO in 1946.3) In the USA, the classical Venturi tube is sometimes called the Herschel Venturi tube. ISO 2016 All rights reserved vBS EN ISO 5167-5:2016BS EN ISO 5167-5:2016Measurement of fluid flow by means of pressure differential devices inserted in circular

39、 cross-section conduits running full Part 5: Cone meters1 ScopeThis part of ISO 5167 specifies the geometry and method of use (installation and operating conditions) of cone meters when they are inserted in a conduit running full to determine the flow rate of the fluid flowing in the conduit.As the

40、uncertainty of an uncalibrated cone meter might be too high for a particular application, it might be deemed essential to calibrate the flow meter in accordance with Clause 7.This part of ISO 5167 also provides background information for calculating the flow rate and is applicable in conjunction wit

41、h the requirements given in ISO 5167-1.This part of ISO 5167 is applicable only to cone meters in which the flow remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. Uncalibrated cone meters can only be used within specified limits of pipe size, ro

42、ughness, , and Reynolds number. This part of ISO 5167 is not applicable to the measurement of pulsating flow. It does not cover the use of uncalibrated cone meters in pipes sized less than 50 mm or more than 500 mm, or where the pipe Reynolds numbers are below 8 104or greater than 1,2 107.A cone met

43、er is a primary device which consists of a cone-shaped restriction held concentrically in the centre of the pipe with the nose of the cone upstream. The design of cone meter defined in this part of ISO 5167 has one or more upstream pressure tappings in the wall, and a downstream pressure tapping pos

44、itioned in the back face of the cone with the connection to a differential pressure transmitter being a hole through the cone to the support bar, and then up through the support bar.Alternative designs of cone meters are available; however, at the time of writing, there is insufficient data to fully

45、 characterize these devices, and therefore, these meters shall be calibrated in accordance with Clause 7.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition c

46、ited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 4006, Measurement of fluid flow in closed conduits Vocabulary and symbolsISO 5167-1:2003, Measurement of fluid flow by means of pressure differential devices inserted in circula

47、r cross-section conduits running full Part 1: General principles and requirements3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 4006, ISO 5167-1, and the following apply.INTERNATIONAL STANDARD ISO 5167-5:2016(E) ISO 2016 All rights reserved 1BS EN IS

48、O 5167-5:2016ISO 5167-5:2016(E)3.1beta edgemaximum circumference of the cone4 Principles of the method of measurement and computationThe principle of the method of measurement is based on the installation of the cone meter into a pipeline in which a fluid is running full. Flow through a cone meter p

49、roduces a differential pressure between the upstream and downstream tappings.The mass flow rate can be determined by Formulae (1) and (2):qCDpm=()142421pi (1)and =122dDc(2)where dcis the diameter of the cone in the plane of the beta edge. This assumes that the diameter of the pipe at the upstream tapping, DTAP, is equal to the diameter of the pipe at the beta edge, D. Figure 1 shows that as the cone diameter increases, decreases.Key1 flowFigure 1 Cone meter showing different values of 2 ISO 2016 All rights reservedB