oSIST prEN 12266-1:2025

Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements

This document specifies requirements for tests, test procedures and acceptance criteria for production testing of industrial valves made of metallic materials.
NOTE   The specified tests can also be used as type tests or acceptance tests.
This document does not apply to:
-   industrial valves of thermoplastic materials;
-   safety valves and bursting discs (safety accessories);
-   sight glass with its frames (component of a pressure equipment).
When specified as a normative reference in a valve product or performance standard, this document is to 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 document, the requirements of the product or performance standard apply.

Industriearmaturen - Prüfung von Armaturen aus Metall - Teil 1: Druckprüfungen, Prüfverfahren und Annahmekriterien - Verbindliche Anforderungen

Dieses Dokument legt verbindliche Anforderungen an Prüfungen, Prüfverfahren und Annahmekriterien für die fertigungsbegleitende Prüfung von Industriearmaturen aus metallischen Werkstoffen fest.
ANMERKUNG   Die festgelegten Prüfungen können auch als Typ- oder Annahmeprüfungen angewendet werden.
Dieses Dokument ist nicht anzuwenden für:
-   Industriearmaturen aus thermoplastischen Werkstoffen;
-   Schutzarmaturen und Berstscheiben (Schutzzubehör);
-   Schaugläser und deren Fassungen (Bauteil eines Druckgerätes).
Wenn dieses Dokument als normative Verweisung in einer Produkt- oder Gebrauchstauglichkeitsnorm für Armaturen aufgeführt ist, muss es im Zusammenhang mit den festgelegten spezifischen Anforderungen dieser Produkt- oder Gebrauchstauglichkeitsnorm beachtet werden. Wenn sich die Anforderungen in einer Produkt- oder Gebrauchstauglichkeitsnorm von den in diesem Dokument festgelegten Anforderungen unterscheiden, dann gelten die Anforderungen der Produkt- oder Gebrauchstauglichkeitsnorm.

Robinetterie industrielle - Essais des appareils de robinetterie métalliques - Partie 1: Essais sous pression, procédures d'essai et critères d'acceptation - Prescriptions obligatoires

Le présent document spécifie les prescriptions pour les essais, les modes opératoires d’essai et les critères d’acceptation pour les essais en production de la robinetterie industrielle en matériaux métalliques.
NOTE   Les essais prescrits peuvent aussi être utilisés en tant qu’essais de type ou essais de réception.
Le présent document ne s'applique pas:
-   aux appareils de robinetterie en matériaux thermoplastiques;
-   aux soupapes de sûreté et aux disques de rupture (accessoire de sécurité);
-   aux éléments de visu avec leurs interfaces (composant d'un équipement sous pression).
Lorsqu’il est spécifié comme référence normative dans une norme de produit ou de performance, le présent document est à considérer conjointement aux prescriptions spécifiques données de la norme de produit ou de performance. Lorsque des prescriptions d’une norme de produit ou de performance diffèrent de celles données dans le présent document, les prescriptions de la norme de produit ou de performance s’appliquent.

Industrijski ventili - Preskušanje kovinskih ventilov - 1. del: Tlačni preskusi, postopki preskušanja in prevzemni pogoji - Obvezujoče zahteve

General Information

• Status: Not Published
• Public Enquiry End Date: 02-Nov-2025
• ICS: 23.060.01 - Valves in general
• Technical Committee: TLP - Pressure vessels
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 10-Sep-2025
• Due Date: 28-Jan-2026
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Mandate: M/601 - COMMISSION IMPLEMENTING DECISION of 1.3.2024 on a standardisation request to the European Committee for Standardization and the European Committee for Electrotechnical Standardization as regards pressure equipment and assemblies in support of Directive 2014/68/EU of the European Parliament and of the Council
• Ref Project: prEN 12266-1 - Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements

Relations

• Revises: SIST EN 12266-1:2012 - Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements
• Effective Date: 01-Oct-2025

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2025
Industrijski ventili - Preskušanje kovinskih ventilov - 1. del: Tlačni preskusi,
postopki preskušanja in prevzemni pogoji - Obvezujoče zahteve
Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and
acceptance criteria - Mandatory requirements
Industriearmaturen - Prüfung von Armaturen aus Metall - Teil 1: Druckprüfungen,
Prüfverfahren und Annahmekriterien - Verbindliche Anforderungen
Robinetterie industrielle - Essais des appareils de robinetterie métalliques - Partie 1:
Essais sous pression, procédures d'essai et critères d'acceptation - Prescriptions
obligatoires
Ta slovenski standard je istoveten z: prEN 12266-1
ICS:
23.060.01 Ventili na splošno Valves in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2025
ICS Will supersede EN 12266-1:2012
English Version
Industrial valves - Testing of metallic valves - Part 1:
Pressure tests, test procedures and acceptance criteria -
Mandatory requirements
Robinetterie industrielle - Essais des appareils de Industriearmaturen - Prüfung von Armaturen aus
robinetterie métalliques - Partie 1: Essais sous Metall - Teil 1: Druckprüfungen, Prüfverfahren und
pression, procédures d'essai et critères d'acceptation - Annahmekriterien - Verbindliche Anforderungen
Prescriptions obligatoires
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-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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12266-1:2025 E
worldwide for CEN national Members.

Contents
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test requirements . 7
5 Designation . 8
Annex A (normative) Test procedures and acceptance criteria . 9
A.1 General requirements . 9
A.1.1 Purpose . 9
A.1.2 Test equipment . 9
A.1.3 Measuring equipment . 9
A.1.4 Painted, coated or lined valves . 9
A.1.5 Test fluid . 9
A.1.6 Equivalent DN numbers . 10
A.2 Shell strength, test reference, P10 . 11
A.2.1 Purpose . 11
A.2.2 Test method . 11
A.2.3 Acceptance criteria. 12
A.3 Shell tightness, test reference, P11 . 13
A.3.1 Purpose . 13
A.3.2 Test method . 13
A.3.3 Acceptance criteria. 14
A.4 Seat tightness, test reference P12 . 14
A.4.1 Purpose . 14
A.4.2 Test method . 14
A.4.3 Acceptance criteria. 16
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure Equipment Directive) aimed to be
covered . 18
Bibliography . 19

European foreword
This document (prEN 12266-1:2025) 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 12266-1:2012.
EN 12266-1:2025 includes the following changes with respect to EN 12266-1:2012:
— some parts were editorially revised;
— the normative references were updated;
— Annex ZA was modified;
— Bibliography was updated.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
EN 12266 series consists of the following parts:
— EN 12266-1, Industrial valves — Testing of metallic valves — Part 1: Pressure tests, test procedures
and acceptance criteria - Mandatory requirements
— EN 12266-2, Industrial valves — Testing of metallic valves — Part 2: Tests, test procedures and
acceptance criteria - Supplementary requirements
NOTE EN 12266-1 was drawn up on the basis of ISO 5208:1993. EN 12266-2 contains supplementary testing
requirements for tests, test procedures and acceptance criteria of valves.
Introduction
The purpose of this document is to establish certain basic requirements for production pressure testing
of industrial valves to ensure uniform tests and test procedures. Tests and procedures given in this
document may also be used, if required, for type tests and acceptance tests.
Special requirements, which are specific to one product or one performance standard only, are not
included in this document. For more detailed information, reference is made to the product standards
and application standards for valves.
1 Scope
This document specifies requirements for tests, test procedures and acceptance criteria for production
testing of industrial valves made of metallic materials.
NOTE The specified tests can also be used as type tests or acceptance tests.
This document does not apply to:
— industrial valves of thermoplastic materials;
— safety valves and bursting discs (safety accessories);
— sight glass with its frames (component of a pressure equipment).
When specified as a normative reference in a valve product or performance standard, this document is to
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
document, the requirements of the product or performance standard apply.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 736-1:2018, Valves - Terminology - Part 1: Definition of types of valves
EN 736-2:2016, Valves - Terminology - Part 2: Definition of components of valves
EN 736-3:2008, Valves - Terminology - Part 3: Definition of terms
EN 764-1:2015+A1:2016, Pressure equipment - Part 1: Vocabulary
EN 1349:2009, Industrial process control valves
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 736-1:2018, EN 736-2:2016,
EN 736-3:2008 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
shell test
test at a pressure in excess of the cold working pressure (3.7) rating of a valve for the purpose of validating
the soundness and strength of the valve pressure containing and retaining structures
Note 1 to entry: These structures include valve-actuating mechanisms that have a direct connection to the valve
internals subject to fluid test pressure within the valve proper.
3.2
test pressure
1)
internal pressure (gauge), expressed in bar to which the valve under testing is subjected
Note 1 to entry: Unless otherwise noted, gauge pressure is used throughout this document.
3.3
test fluid
pressurized liquid or gas used to test a valve
3.4
test fluid temperature
temperature of the test fluid, ≥ 5 °C and ≤ 40 °C
3.5
DN, NPS
alphanumeric designation of size that is common for components used in a piping system, used for
reference purposes, comprising the letters “DN” or “NPS” followed or preceded by a dimensionless
number indirectly related to the physical size of the bore or outside diameter of the end connections
Note 1 to entry: The number following “DN” or ”NPS” does not represent a measurable value and should not be used
for calculation purposes except where specified in a product standard.
Note 2 to entry: In those standards which use the DN designation system, any relationship between DN and
component dimensions should be given, e.g. DN/OD or DN/ID.
Note 3 to entry: The DN definition is based on EN ISO 6708:1995, 2.1.
Note 4 to entry: The NPS definition is based on EN 1759-1:2004, 3.3.
3.6
PN or Class
alphanumeric designation for pressure-temperature rating that is common for components used in a
piping system, used for reference purposes, comprising the letters “PN“ or “Class” followed by a
dimensionless number indirectly related to the pressure retaining capability as a function of temperature
of the component
Note 1 to entry: The PN definition is based on EN 1333:2006, 2.1.
Note 1 to entry: The Class definition is based on EN 1759-1:2004, 3.1.
3.7
cold working pressure
CWP
maximum fluid pressure assigned to a valve for operation at a fluid temperature of – 20 °C to 38 °C
Note 1 to entry: Valve pressure-temperature ratings are specified in product standards by reference to PN or Class
designations.
1)
1 bar = 10 Pa.
oSIST prEN 12266-1:20
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