SIST EN 16668:2025
(Main)Industrial valves - Requirements and testing for metallic valves as pressure accessories
Industrial valves - Requirements and testing for metallic valves as pressure accessories
This document applies to metallic valves as pressure accessories for industrial applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for pressure equipment and specifies minimum requirements applicable to design, manufacture, testing, materials and documentation.
All relevant essential safety requirements of the European legislation for pressure equipment applicable to valves have been taken into consideration and are addressed in this document.
This document is not applicable to:
- safety valve and bursting disc (a safety accessory),
- sight glass with its frames (component of a pressure equipment) and
- measurement chambers.
For other exclusions, refer to the European legislation for pressure equipment [31].
Industriearmaturen - Anforderungen und Prüfungen für Metallarmaturen als drucktragende Ausrüstungsteile
Dieses Dokument gilt für Metallarmaturen als drucktragende Ausrüstungsteile für Anwendungen in der Industrie mit einem maximal zulässigen Druck (PS) größer als 0,5 bar nach der Europäischen Richtlinie über Druckgeräte und legt die Mindestanforderungen fest, die für die Gestaltung (Auslegung), Herstellung, Prüfung, Werkstoffe und Dokumentation gelten.
Sämtliche relevanten grundlegenden Sicherheitsanforderungen der Europäischen Richtlinie über Druckgeräte, die für die Armaturen gelten, wurden berücksichtigt und werden in dieser Norm behandelt.
Dieses Dokument ist nicht anwendbar auf:
- Sicherheitsventile und Berstscheiben (ein Ausrüstungsteil mit Sicherheitsfunktion);
- Schaugläser und deren Fassungen (Bauteil eines Druckgerätes) und
- Messkammern.
Hinsichtlich weiterer Ausschlüsse wird auf die Europäische Richtlinie über Druckgeräte [31] verwiesen.
Robinetterie industrielle - Exigences et essais pour appareils de robinetterie métalliques utilisés comme accessoires sous pression
Le présent document est applicable aux appareils de robinetterie métalliques utilisés comme accessoires sous pression pour applications industrielles avec une pression maximale admissible PS supérieure à 0,5 bar, conformément à la règlementation européenne pour les équipements sous pression", et spécifie les exigences minimales applicables en matière de conception, de fabrication, d'essais, de matériaux et de documentation.
Toutes les exigences essentielles de sécurité pertinentes de la règlementation européenne pour les équipements sous pression" applicables aux appareils de robinetterie ont été prises en considération et sont traitées dans le présent document.
Le présent document ne s'applique pas :
- aux soupapes de sûreté et disques de rupture (accessoires de sécurité),
- aux voyants et à leurs cadres (composants d'un équipement sous pression), et
- aux chambres de mesure.
Pour les autres exclusions, se reporter à la règlementation européenne pour les équipements sous pression [31].
Industrijski ventili - Zahteve in preskušanje kovinskih ventilov kot tlačnega pribora
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Nadomešča:
SIST EN 16668:2016+A1:2018
Industrijski ventili - Zahteve in preskušanje kovinskih ventilov kot tlačnega pribora
Industrial valves - Requirements and testing for metallic valves as pressure accessories
Industriearmaturen - Anforderungen und Prüfungen für Metallarmaturen als
drucktragende Ausrüstungsteile
Robinetterie industrielle - Exigences et essais pour appareils de robinetterie métalliques
utilisés comme accessoires sous pression
Ta slovenski standard je istoveten z: EN 16668:2025
ICS:
23.060.01 Ventili na splošno Valves in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 16668
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 23.060.01 Supersedes EN 16668:2016+A1:2018
English Version
Industrial valves - Requirements and testing for metallic
valves as pressure accessories
Robinetterie industrielle - Exigences et essais pour Industriearmaturen - Anforderungen und Prüfungen
appareils de robinetterie métalliques utilisés comme für Metallarmaturen als drucktragende
accessoires sous pression Ausrüstungsteile
This European Standard was approved by CEN on 22 December 2024.
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
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. EN 16668:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 8
4 Category of valves . 9
5 Requirements . 9
5.1 Design . 9
5.1.1 General . 9
5.1.2 Shell design strength . 10
5.1.3 Protection against exceeding the allowable limits . 10
5.2 Materials . 10
5.2.1 General requirements . 10
5.2.2 European harmonized material standards. 10
5.2.3 European approval of materials (EAM) . 10
5.2.4 Particular Material Appraisal (PMA) . 11
5.2.5 Requirements for prevention of brittle fracture at low temperatures . 11
5.2.6 Selection of bolting material . 11
5.2.7 Material selection for parts other than shell . 11
5.3 Manufacturing . 12
5.3.1 Welding . 12
5.3.2 Heat treatment . 14
5.3.3 Traceability . 14
5.3.4 Qualification of non-destructive testing personnel . 14
5.4 Non-destructive testing (NDT) . 14
5.4.1 Non-destructive testing of steel castings . 14
5.4.2 Non-destructive testing of joint welding . 14
5.5 Final assessment . 14
5.6 Marking . 15
5.7 Surface and coating testing . 15
5.8 Documentation . 15
5.8.1 Documentation for final inspection. 15
5.8.2 Accompanying documents . 16
Annex A (normative) Classification of valves. 17
Annex B (informative) European harmonized standards for materials and components for
shell parts . 22
Annex C (informative) European Approval of Materials (EAM) . 24
Annex D (informative) European harmonized standards for valves . 25
Annex E (informative) Non-destructive testing of steel castings . 27
E.1 Terms and definitions . 27
E.2 Non-destructive testing of steel castings . 27
Annex F (normative) Non-destructive testing (NDT) of joint welding . 35
F.1 General . 35
F.2 Non-destructive testing (NDT) extent . 35
F.3 Selection of NDT-methods . 41
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure Equipment Directive) aimed to be
covered . 42
Bibliography . 44
European foreword
This document (EN 16668:2025) 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 2025, and conflicting national standards shall be
withdrawn at the latest by August 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 16668:2016+A1:2018.
This document includes the following significant technical changes with respect to
EN 16668:2016+A1:2018:
— the most important changes have been made in the following clauses and subclauses: Clause 4, 5.1.2,
5.1.3, 5.2.1, 5.2.4, 5.3.1.3, 5.3.1.4, 5.3.1.5, 5.3.1.6, 5.3.3, 5.3.4, 5.8.1, 5.8.2 and Annex A;
— the following tables have been modified: Table 2 and Table E.1;
— Annex ZA has been modified;
— dated references have been 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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
This document is to be understood as an umbrella standard referencing European harmonized standards
for industrial metallic valves as pressure accessories for industrial applications. It covers the
requirements to meet the Essential Safety Requirements of the Pressure Equipment Directive.
1 Scope
This document is applicable to metallic valves as pressure accessories for industrial applications with a
maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for
pressure equipment and specifies requirements applicable to design, manufacture, testing, materials and
documentation.
All essential safety requirements of the European legislation for pressure equipment applicable to valves
have been taken into consideration and are addressed in this document.
This document does not apply to:
— safety valve and bursting disc (safety accessories),
— sight glass with its frames (component of a pressure equipment), and
— measurement chambers.
For other exclusions, refer to the European legislation for pressure equipment [60].
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 19:2023, Industrial valves — Marking of metallic valves
EN 736-1:2018, Valves — Terminology — Part 1: Definition of types of valves
EN 764-1:2015+A1:2016, Pressure equipment — Part 1: Vocabulary
EN 764-2:2012, Pressure equipment — Part 2: Quantities, symbols and units
EN 764-4:2014, Pressure equipment — Part 4: Establishment of technical delivery conditions for metallic
materials
EN 764-5:2014, Pressure equipment — Part 5: Inspection documentation of metallic materials and
compliance with the material specification
EN 764-7:2002, Pressure equipment — Part 7: Safety systems for unfired pressure equipment
EN 1349:200
...
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