Industrial valves - Testing of metallic valves - Part 2: Tests, test procedures and acceptance criteria - Supplementary requirements

This standard specifies requirements for supplementary tests, test procedures and acceptance criteria. The specified tests may be used as type tests, production tests or acceptance tests. The application of these tests will be specified in the appropriate product or performance standards. Where requirements in a product or performance standard differ from those given in this standard, then the requirements of the product or performance apply.

Industriearmaturen - Prüfung von Armaturen aus Metall - Teil 2: Prüfungen, Prüfverfahren und Annahmekriterien - Ergänzende Anforderungen

Diese Europäische Norm legt zusätzliche Anforderungen an Prüfungen, Prüfverfahren und Annahmekriterien für Industriearmaturen fest.
Die festgelegten Prüfungen können als Typ , fertigungsbegleitende oder Annahmeprüfungen angewendet werden. Die Anwendung dieser Prüfungen ist in den entsprechenden Produkt- oder Gebrauchstauglich¬keits-normen festgelegt.
Wenn diese Europäische Norm als normative Verweisung in einer Produkt- oder Gebrauchstauglichkeitsnorm für Armaturen aufgeführt ist, muss sie im Zusammenhang mit den festgelegten Anforderungen dieser Produkt- oder Ge¬brauchs¬tauglichkeitsnorm betrachtet werden. Wenn sich die Anforderungen in einer Produkt- oder Gebrauchs¬tauglichkeits¬norm von den in dieser Norm festgelegten Anforderungen unterscheiden, dann gelten die Anforderungen der Produkt- oder Gebrauchstauglichkeitsnorm.
ANMERKUNG   Für die Prüfung von Industriearmaturen aus Kunststoffen gelten ISO 9393-1 und ISO 9393-2.

Robinetterie industrielle - Essais des appareils de robinetterie métalliques - Partie 2: Essais, modes opératoires d'essai et critères d'acceptation - Prescriptions complémentaires

La présente Norme européenne spécifie les prescriptions complémentaires pour des essais, des modes opératoires d’essai et des critères d’acceptation pour la robinetterie industrielle faite de matériaux métalliques.
Les essais prescrits peuvent être effectués en production, en tant qu’essais de type ou essais de réception. L’application de ces essais est prescrite par les normes de produit ou de performance appropriées.
Lorsque la présente Norme européenne est spécifiée en tant que référence normative dans une norme de produit ou de performance, elle doit être considérée conjointement aux prescriptions données de cette norme de produit ou de performance. Lorsque des prescriptions d’une norme de produit ou de performance diffèrent de celles données dans la présente Norme européenne, alors les prescriptions de la norme de produit ou de performance s’appliquent.
NOTE   Pour les essais d'appareils de robinetterie industriels en matériaux thermoplastiques, l'ISO 9393-1 et l'ISO 9393-2 s'appliquent.

Industrijski ventili - Preskušanje kovinskih ventilov - 2. del: Preskusi, postopki preskušanja in prevzemni pogoji - Dodatne zahteve

Ta evropski standard določa dodatne zahteve za preskuse, postopke preskušanja in prevzemne pogoje za industrijske ventile, izdelane iz kovinskih materialov. Predpisani preskusi se lahko uporabijo kot tipski preskusi, proizvodni preskusi ali prevzemni preskusi. Uporaba teh preskusov je opredeljena v ustreznih standardih za izdelek ali lastnosti. Kadar je ta evropski standard v standardu za izdelek ali lastnosti ventila naveden v okviru zvez z drugimi standardi, ga je treba upoštevati skupaj z danimi posebnimi zahtevami standarda za izdelek ali lastnosti ventila. Kadar se zahteve v standardu za izdelek ali lastnosti razlikujejo od zahtev iz tega evropskega standarda, se uporabljajo zahteve standarda za izdelek ali lastnosti.

General Information

Status
Published
Public Enquiry End Date
16-Nov-2009
Publication Date
27-Mar-2012
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-Mar-2012
Due Date
27-May-2012
Completion Date
28-Mar-2012

Relations

Buy Standard

Standard
EN 12266-2:2012
English language
17 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day
Draft
prEN 12266-2:2009
English language
16 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Industrijski ventili - Preskušanje kovinskih ventilov - 2. del: Preskusi, postopki preskušanja in prevzemni pogoji - Dodatne zahteveIndustriearmaturen - Prüfung von Armaturen aus Metall - Teil 2: Prüfungen, Prüfverfahren und Annahmekriterien - Ergänzende AnforderungenRobinetterie industrielle - Essais des appareils de robinetterie métalliques - Partie 2: Essais, modes opératoires d'essai et critères d'acceptation - Prescriptions complémentairesIndustrial valves - Testing of metallic valves - Part 2: Tests, test procedures and acceptance criteria - Supplementary requirements23.060.01Ventili na splošnoValves in generalICS:Ta slovenski standard je istoveten z:EN 12266-2:2012SIST EN 12266-2:2012en,fr,de01-maj-2012SIST EN 12266-2:2012SLOVENSKI
STANDARDSIST EN 12266-2:20031DGRPHãþD



SIST EN 12266-2:2012



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE 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 - Supplementary requirements
Robinetterie industrielle - Essais des appareils de robinetterie métalliques - Partie 2: Essais, modes opératoires d'essai et critères d'acceptation - Prescriptions complémentaires
Industriearmaturen - Prüfung von Armaturen aus Metall - Teil 2: Prüfungen, Prüfverfahren und Annahmekriterien - Ergänzende 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 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 official 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 of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, 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
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR 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: ESIST EN 12266-2:2012



EN 12266-2:2012 (E) 2 Contents Page Foreword . 3Introduction . 41 Scope . 52 Normative references . 53 Terms and definitions . 54 Test requirements . 55 Designation . 6Annex A (normative)
Pressure tests – Test procedures and acceptance criteria . 7A.1 General requirements . 7A.2 Obturator strength, Test reference P20 . 9A.3 Back seat tightness, Test reference P21 . 12Annex B (normative)
Functional tests — Test procedures and acceptance criteria . 15B.1 Operability, Test reference F20 . 15B.2 Anti-static design, Test reference F21 and reference F22 . 15B.3 Acceptance criteria . 16Bibliography . 17 SIST EN 12266-2:2012



EN 12266-2:2012 (E) 3 Foreword This document (EN 12266-2:2012) 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 conflicting 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 document 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 parts:  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 requirements 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 Test 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 Regulations, 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, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12266-2:2012



EN 12266-2:2012 (E) 4 Introduction The purpose of this European Standard is to establish certain basic requirements for supplementary production pressure 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 performance standard only, are not included in this European Standard. Details should be included in the appropriate standard. SIST EN 12266-2:2012



EN 12266-2:2012 (E) 5 1 Scope This European Standard specifies supplementary requirements for tests, test procedures and acceptance criteria of industrial valves 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, this 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 apply. 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 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 valves — 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 performance 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. SIST EN 12266-2:2012



EN 12266-2:2012 (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 seat 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 devices 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 confirm 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 a F24 test does not apply to control valves.
5 Designation Tests in accordance 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 SIST EN 12266-2:2012



EN 12266-2:2012 (E) 7 Annex A (normative)
Pressure tests – Test procedures and acceptance criteria A.1 General requirements 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 precautions. 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. When 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 equipment 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 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 test 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 temperature shall be between 5 °C and 40 °C. SIST EN 12266-2:2012



EN 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 f
...

SLOVENSKI STANDARD
oSIST prEN 12266-2:2009
01-november-2009
Industrijski ventili - Preskušanje kovinskih ventilov - 2. del: Preskusi, postopki
preskušanja in prevzemni pogoji - Dodatne zahteve
Industrial valves - Testing of metallic valves - Part 2: Tests, test procedures and
acceptance criteria - Supplementary requirements
Industriearmaturen - Prüfung von Armaturen aus Metall - Teil 2: Prüfungen,
Prüfverfahren und Annahmekriterien - Ergänzende Anforderungen
Robinetterie industrielle - Essais des appareils de robinetterie métalliques - Partie 2:
Essais, modes opératoires d'essai et critères d'acceptation - Prescriptions
complémentaires
Ta slovenski standard je istoveten z: prEN 12266-2
ICS:
23.060.01 Ventili na splošno Valves in general
oSIST prEN 12266-2:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 12266-2:2009

---------------------- Page: 2 ----------------------
oSIST prEN 12266-2:2009
EUROPEAN STANDARD
DRAFT
prEN 12266-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2009
ICS 23.060.01 Will supersede EN 12266-2:2002
English Version
Industrial valves - Testing of metallic valves - Part 2: Tests, test
procedures and acceptance criteria - Supplementary
requirements
Robinetterie industrielle - Essais des appareils de Industriearmaturen - Prüfung von metallischer Armaturen -
robinetterie métalliques - Partie 2: Essais, modes Teil 2: Prüfungen, Prüfverfahren und Annahmekriterien -
opératoires d'essai et critères d'acceptation - Prescriptions Ergänzende Anforderungen
complémentaires
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 69.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN in three official 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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12266-2:2009: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 12266-2:2009
prEN 12266-2:2009 (E)
Contents Page
Foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test requirements . 5
5 Designation . 6
Annex A (normative) Pressure tests – Test procedures and acceptance criteria . 7
A.1 General requirements . 7
A.2 Obturator strength, Test reference P20 . 9
A.3 Back seat tightness, Test reference P21 . 12
Annex B (normative) Functional tests — Test procedures and acceptance criteria . 14
B.1 Operability, Test reference F20 . 14
B.2 Anti-static design, Test reference F21 and reference F22 . 14
B.3 Acceptance criteria . 15
Bibliography . 16

2

---------------------- Page: 4 ----------------------
oSIST prEN 12266-2:2009
prEN 12266-2:2009 (E)
Foreword
This document (prEN 12266-2:2009) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”,
the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12266-2:2002.
EN 12266 Industrial valves — Testing of metallic valves consists of the following parts:
 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. EN 12266-2 contains supplementary
testing requirements for tests, test procedures and acceptance criteria of valves.
3

---------------------- Page: 5 ----------------------
oSIST prEN 12266-2:2009
prEN 12266-2:2009 (E)
Introduction
The purpose of this European Standard is to establish certain basic requirements for supplementary production
pressure 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 performance standard only, are not included in this
European Standard. Details should be included in the appropriate standard.
4

---------------------- Page: 6 ----------------------
oSIST prEN 12266-2:2009
prEN 12266-2:2009 (E)
1 Scope
This European Standard specifies supplementary requirements for tests, test procedures and acceptance criteria of
industrial valves 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, this European Standard shall
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 apply.
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 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
1)
prEN 1267 , Industrial valves — Test of flow resistance using water as test fluid
1)
prEN ISO 10497 , Testing of valves — Fire type-testing requirements
1)
prEN 12266-1:2009 , Industrial valves — Testing of metallic valves — Part 1: Pressure tests, test procedures and
acceptance criteria — Mandatory requirements
EN 12516 (all parts), Industrial valves — Shell design strength
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 736-1, EN 763-2 and EN 763-3 apply.
4 Test requirements
The product or performance standards 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.

1)
Under preparation.
5

---------------------- Page: 7 ----------------------
oSIST prEN 12266-2:2009
prEN 12266-2:2009 (E)
Table 1 – Requirements for tests, test procedures and acceptance criteria
Test
Test procedure and
Purpose
acceptance criteria
Title Test reference
To confirm the allowable differential
Obturator strength P20 pressure containing capability of the see A.2
obturator in the closed position
To confirm the capacity of the back seat to
Back seat tightness P21 the specified leakage rate at the time of see A.3
manufacture
To confirm the complete opening and
closing capability of the valve and, where
Operability F20 applicable, the correct operation of the see B.1
position indicators or other auxiliary
devices
Anti-static design at To confirm electrical conductivity between
F21 see B.2.2.2
12 V the obturator and the body of the valve
Anti-static design at To confirm electrical conductivity between
F22 see B.2.2.3
100 V the obturator and the body of the valve
To confirm the pressure containing
Fire tested design F23 capability of the valve under pressure prEN ISO 10497
during and after specified fire conditions
To confirm the specified flow coefficient or
Flow resistance F24 prEN 1267
flow resistance coefficient

5 Designation
Tests in accordance 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
6

---------------------- Page: 8 ----------------------
oSIST prEN 12266-2:2009
prEN 12266-2:2009 (E)
Annex A
(normative)

Pressure tests – Test procedures and acceptance criteria
A.1 General requirements
A.1.1 Purpose
These general requirements shall be applied to all the test procedures defined in Annex 1.
Safety aspects of valve testing are not covered in this European Standard. Users of this European Standard should
analyse the hazard resulting from the pressure and take proper safety precautions.
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.
When 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 equipment 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 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 test 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 temperature shall be between 5 °C and 40 °C.
7

---------------------- Page: 9 ----------------------
oSIST prEN 12266-2:2009
prEN 12266-2:2009 (E)
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 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
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.