1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12266-2:2012Industrial valves Testing ofmetallic valvesPart 2: Tests, test procedures andacceptance criteria SupplementaryrequirementsBS EN 12266-2:2012 BRITISH STANDARDNat
2、ional forewordThis British Standard is the UK implementation of EN 12266-2:2012.It supersedes BS EN 12266-2:2002 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PSE/18/1, Industrial valves, steam traps, actuators andsafety devices against excessive pres
3、sure - Valves - Basic standards.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 contract. Users are responsible for its correctapplication. The British Standards Institution
4、 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 67643 7ICS 23.060.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 29 February 2012.Amendments issued
5、since publicationDate Text affectedBS EN 12266-2:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12266-2 February 2012 ICS 23.060.01 Supersedes EN 12266-2:2002English Version Industrial valves - Testing of metallic valves - Part 2: Tests, test procedures and acceptance criteria - Supplement
6、ary requirements Robinetterie industrielle - Essais des appareils de robinetterie mtalliques - Partie 2: Essais, modes opratoires dessai et critres dacceptation - Prescriptions complmentaires Industriearmaturen - Prfung von Armaturen aus Metall - Teil 2: Prfungen, Prfverfahren und Annahmekriterien -
7、 Ergnzende Anforderungen This European Standard was approved by CEN on 16 December 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lis
8、ts 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 official versions (English, French, German). A version in any other language made by translation under
9、 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 of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, G
10、ermany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE
11、 FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12266-2:2012: EBS EN 12266-2:2012EN 12266-2:2012 (E) 2 Contents Page Foreword 3g3Introduction . 4g31 Scope 5g32 N
12、ormative references 5g33 Terms and definitions . 5g34 Test requirements 5g35 Designation 6g3Annex A (normative) Pressure tests Test procedures and acceptance criteria 7g3A.1 General requirements 7g3A.2 Obturator strength, Test reference P20 . 9g3A.3 Back seat tightness, Test reference P21 . 12g3Anne
13、x B (normative) Functional tests Test procedures and acceptance criteria . 15g3B.1 Operability, Test reference F20 15g3B.2 Anti-static design, Test reference F21 and reference F22 . 15g3B.3 Acceptance criteria 16g3Bibliography 17g3BS EN 12266-2:2012EN 12266-2:2012 (E) 3 Foreword This document (EN 12
14、266-2:2012) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2012, and conf
15、licting national standards shall be withdrawn at the latest by August 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This docum
16、ent supersedes EN 12266-2:2002. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). EN 12266, Industrial valves Testing of metallic valves consists of the following pa
17、rts: Part 1: Pressure tests, test procedures and acceptance criteria Mandatory requirements Part 2: Tests, test procedures and acceptance criteria Supplementary requirements EN 12266-1 was drawn up on the basis of International Standard ISO 5208:1993. EN 12266-2 contains supplementary testing requir
18、ements for tests, test procedures and acceptance criteria of valves. The main changes compared to the previous edition are: a) Introduction was changed; b) Normative references were updated; c) Clause 4 Test requirements was updated; d) Sub-clauses A.1.4 and A.1.5 were changed; e) Sub-clause A.1.6 T
19、est pressure was deleted; f) Clause A.2 Obturator strength, Test reference P20 was changed; g) Clause A.3 Back seat tightness, Test reference P21 was changed editorially; h) Clause B.1 was changed; i) Sub-clause B.2.3 was editorially changed into Clause B.3. According to the CEN/CENELEC Internal Reg
20、ulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, M
21、alta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12266-2:2012EN 12266-2:2012 (E) 4 Introduction The purpose of this European Standard is to establish certain basic requirements for supplementary production pres
22、sure testing of industrial valves in order to ensure uniform tests and test procedures. Tests and procedures given in this European Standard may be used for production tests and, where applicable, for type tests and acceptance tests. Special requirements, which are specific to one product or one per
23、formance standard only, are not included in this European Standard. Details should be included in the appropriate standard. BS EN 12266-2:2012EN 12266-2:2012 (E) 5 1 Scope This European Standard specifies supplementary requirements for tests, test procedures and acceptance criteria of industrial val
24、ves made of metallic materials. The specified tests may be used as type tests, production tests or acceptance tests. The application of these tests is specified in the appropriate product or performance standards. When specified as a normative reference in a valve product or performance standard, th
25、is European Standard should be considered in conjunction with given specific requirements of the valve product or performance standard. Where requirements in a product or performance standard differ from those given in this European Standard, the requirements of the product or performance standard a
26、pply. NOTE For testing of industrial valves of thermoplastic materials, ISO 9393-1 and ISO 9393-2 apply. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the
27、 latest edition of the referenced document (including any amendments) applies. EN 736-1, Valves Terminology Part 1: Definition of types of valves EN 736-2, Valves Terminology Part 2: Definition of components of valves EN 736-3, Valves Terminology Part 3: Definition of terms EN 1267, Industrial valve
28、s Test of flow resistance using water as test fluid EN ISO 10497, Testing of valves Fire type-testing requirements (ISO 10497) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 736-1, EN 736-2 and EN 736-3 apply. 4 Test requirements The product or perfo
29、rmance standard specifies which tests or inspections shall be applied to the valve listed in Table 1. Test procedures and acceptance criteria shall be as given in Annex A for pressure tests, in Annex B for functional tests or in other specified standards, see Table 1. BS EN 12266-2:2012EN 12266-2:20
30、12 (E) 6 Table 1 Requirements for tests, test procedures and acceptance criteria Test Purpose Test procedure and acceptance criteria Title Test reference Obturator strength P20 To confirm the allowable differential pressure containing capability of the obturator in the closed position see A.2 Back s
31、eat tightness P21 To confirm the capacity of the back seat to the specified leakage rate at the time of manufacture see A.3 Operability F20 To confirm the complete opening and closing capability of the valve and, where applicable, the correct operation of the position indicators or other auxiliary d
32、evices see B.1 Anti-static design at 12 V F21 To confirm electrical conductivity between the obturator and the body of the valve see B.2.2.2 Anti-static design at 100 V F22 To confirm electrical conductivity between the obturator and the body of the valve see B.2.2.3 Fire tested design F23 To confir
33、m the pressure containing capability of the valve under pressure during and after specified fire conditions EN ISO 10497 Flow resistance F24 a To confirm the specified flow coefficient or flow resistance coefficient EN 1267 aF24 test does not apply to control valves. 5 Designation Tests in accordanc
34、e with this European Standard shall be designated by the following elements: title of test and test reference; EN 12266-2. EXAMPLE Operability Test F20 EN 12266-2 BS EN 12266-2:2012EN 12266-2:2012 (E) 7 Annex A (normative) Pressure tests Test procedures and acceptance criteria A.1 General requiremen
35、ts A.1.1 Purpose These general requirements shall be applied to all the test procedures defined in Annex A. Safety aspects of valve testing are not covered in this European Standard. NOTE Users of this European Standard should analyse the hazard resulting from the pressure and take proper safety pre
36、cautions. A.1.2 Test equipment The test equipment shall be of such a design that it does not subject the valve to externally applied loads which may affect the results of the test. NOTE The test equipment can apply external loads sufficient to react to the forces resulting from the test pressure. Wh
37、en using test equipment and procedures different to that detailed in this European Standard, the manufacturer shall be able to demonstrate the equivalence of such test procedures and acceptance criteria with the requirements of this European Standard. A.1.3 Measuring equipment The measuring equipmen
38、t shall be capable of measuring fluid pressure with an accuracy of 5 % of the required test pressure. A.1.4 Painted, coated or lined valves Valves with liners, internal linings or internal coatings forming a design feature of the valve may be tested with the liner, after lining or coating. Attention
39、 shall be given that the internal linings or internal coatings are not damaged by the test procedure. NOTE If tests in the presence of a representative of the purchaser are specified, painted or coated valves from stock may be retested without removal of painting or coating. A.1.5 Test fluid The tes
40、t fluid to be used shall be: either a liquid (water which may contain a corrosion inhibitor, or any other suitable liquid having a viscosity not greater than water); or a gas (air or other suitable gas). Relevant detailed test procedures are specified in A.2.2.1 and A.3.2.1. The test fluid temperatu
41、re shall be between 5 C and 40 C. BS EN 12266-2:2012EN 12266-2:2012 (E) 8 A.1.6 Equivalent DN numbers For the purpose of calculating seat leakage rates and test duration times it is necessary to establish the equivalent DN number for those valves which are designated other than by DN. The equivalent
42、 DN numbers of valves having flanged ends, threaded ends, weld ends, capillary or compression ends shall be as given in Table A.1. Table A.1 Equivalent DN numbers for different types of body ends Equivalent DN numbers Flanged, threaded or welding ends NPS Capillary or compression ends for copper tub
43、e Compression ends for plastic tube mm mm8 8 10 10; 12 10; 12 15 14; 14,7; 15; 16; 18 14,7; 15; 16; 18 20 21; 22 20; 21; 22 25 1 25; 27,4; 28 25; 27,4; 28 32 1 34; 35; 38 32; 34 40 1 40; 40,5; 42 40; 40,5 50 2 53,6; 54 50; 53,6 65 2 64; 66,7; 70 63 80 3 76,1; 80; 88,9 75; 90 100 4 108 110125 5 150 6
44、 200 8 250 10 300 12 350 14 400 16 450 18 500 20 600 24 650 26 700 28 750 30 800 32 900 36 1 000 40 BS EN 12266-2:2012EN 12266-2:2012 (E) 9 A.2 Obturator strength, Test reference P20 A.2.1 Purpose The test shall confirm the allowable differential pressure containing capability of the obturator in th
45、e closed position. NOTE The test is applicable when a valve is used as single means of insulation between the content of an item of pressure equipment and the downstream equipment not designed to withstand the upstream pressure. A.2.2 Test method A.2.2.1 Test procedure The test fluid shall be a liqu
46、id or gas. The choice of the test medium is the responsibility of the manufacturer. WARNING When the test medium is a gas, additional safety measures may be applied. The test procedure to be used for the different types of valves shall be taken from Table A.2. BS EN 12266-2:2012EN 12266-2:2012 (E) 1
47、0 Table A.2 Obturator strength test method Type of valve Test procedure Gate valve Ball valve Plug valve 1. Fill the valve cavity including, if appropriate, the bonnet cavity with the test fluid. 2. Move the obturator to the closed position with the other side open to atmosphere. 3. Apply the test p
48、ressure specified in A.2.2.2 and maintain the test pressure for the test duration specified in A.2.2.3. 4. Examine the obturator for leak tightness. 5. Repeat 3 and 4 inclusive for the other side of the valve. See NOTES 1, 2 and 3. Globe valve 1. Fill the upstream valve cavity with the test fluid. 2
49、. Move the obturator to the closed position. 3. Apply the test pressure specified in A.2.2.2 in the direction to unseat the obturator with the other side open to atmosphere and maintain the test pressure for the test duration specified in A.2.2.3. 4. Examine the obturator for leak tightness. Diaphragm valve 1. Fill the valve cavity with the test fluid. 2. Move the obturator to the closed position. 3. Apply the test pressure specified in
