FprEN 16668

SLOVENSKI STANDARD
01-marec-2022
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: prEN 16668
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
prEN 16668
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2022
ICS 23.060.01 Will supersede 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 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, Turkey 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16668:2022 E
worldwide for CEN national Members.

prEN 16668:2022 (E)
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 . 9
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 standards . 10
5.2.3 European approval of materials (EAM) . 10
5.2.4 Particular Material Appraisal (PMA) . 10
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 . 11
5.3.1 Welding . 11
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 supporting 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
prEN 16668:2022 (E)
E.2.1 General . 27
E.2.2 Testing procedures . 30
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 . 43
Bibliography . 43

prEN 16668:2022 (E)
European foreword
This document (prEN 16668:2022) 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 16668:2016+A1:2018.
In comparison with the previous edition, the following technical modifications have been made:
— the following clauses and subclauses were modified: 5.3.1.1, 5.3.1.2, 5.3.1.3, 5.3.1.4, 5.3.1.5, 5.3.1.6,
5.3.1.7, 5.3.2, 5.3.4;
— Annex ZA was modified.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.
prEN 16668:2022 (E)
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 relevant
minimum requirements to meet the Essential Safety Requirements of the Pressure Equipment Directive.
prEN 16668:2022 (E)
1 Scope
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].
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:— , 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 1349:2009, Industrial process control valves
EN 10269:2013, Steels and nickel alloys for fasteners with specified elevated and/or low temperature
properties
EN 12266-1:2012, Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and
acceptance criteria - Mandatory requirements
EN 12266-2:2012, Industrial valves - Testing of metallic valves - Part 2: Tests, test procedures and
acceptance criteria - Supplementary requirements

Under preparation. Current stage
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