prEN 18191
(Main)Industrial valves - Additional requirements for metallic valves for hydrogen application
Industrial valves - Additional requirements for metallic valves for hydrogen application
This document applies to industrial metallic valves for hydrogen use. It contains recommendations and additional requirements applicable to material selection, design, manufacture, and final assessment.
This document addresses the following four services/damage mechanisms, which might exist in combinations:
- low temperature applications;
- hydrogen environmental embrittlement (HEE) or hydrogen-induced cracking (HIC);
- high temperature hydrogen attack (HTHA);
- hydrogen service with cyclic loads (fatigue).
The document considers the difference between gaseous hydrogen (GH2) and liquid hydrogen (LH2), where necessary.
The additional provisions set out in this document do not cover corrosion such as electro-chemical corrosion of metals under participation of hydrogen (e.g. sour gas).
This document is based on the requirements contained in the standards specified below:
- applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for pressure equipment, the applicable provisions of EN 16668 apply;
- additional requirements for valves in chemical and petrochemical applications are specified in EN 12569;
- additional requirements for valves in gas distribution systems are specified in EN 13774;
- additional requirements for valves in gas transportation systems are specified in EN 14141.
Industriearmaturen - Zusätzliche Anforderungen an metallische Armaturen für Wasserstoffanwendungen
Dieses Dokument ist für Industriearmaturen aus Metall zur Verwendung mit Wasserstoff anwendbar. Es enthält Empfehlungen und zusätzliche Anforderungen für die Materialauswahl, Konstruktion, Herstellung und abschließende Bewertung.
In diesem Dokument werden die folgenden vier Betriebs /Schädigungsmechanismen behandelt, die in Kombination auftreten können:
- Anwendungen bei niedrigen Temperaturen;
- umweltbedingte Wasserstoffversprödung (en: hydrogen environmental embrittlement, HEE) oder wasserstoffinduzierte Rissbildung (en: hydrogen-induced cracking, HIC);
- Hochtemperatur-Wasserstoffangriff (en: high temperature hydrogen attack, HTHA);
- Wasserstoffbetrieb mit zyklischer Belastung (Ermüdung).
Das Dokument berücksichtigt, soweit erforderlich, den Unterschied zwischen gasförmigem Wasserstoff (GH2) und flüssigem Wasserstoff (LH2).
Die in diesem Dokument aufgeführten zusätzlichen Festlegungen gelten nicht für Korrosion wie elektrochemische Korrosion von Metallen unter Beteiligung von Wasserstoff (z. B. saures Erdgas).
Grundlage für dieses Dokument bilden die Anforderungen, die in den unten aufgeführten Normen enthalten sind:
- für Anwendungen mit einem maximal zulässigen Druck PS von mehr als 0,5 bar nach den europäischen Rechtsvorschriften für drucktragende Ausrüstungsteile sind die einschlägigen Festlegungen von EN 16668 anwendbar;
- zusätzliche Anforderungen an Armaturen in chemischen und petrochemischen Anwendungen sind in EN 12569 festgelegt;
- zusätzliche Anforderungen an Armaturen in chemischen und petrochemischen Anwendungen sind in EN 13774 festgelegt;
- zusätzliche Anforderungen an Armaturen in Gasverteilungssystemen sind in EN 14141 festgelegt.
Robinetterie industrielle - Exigences supplémentaires pour les appareils de robinetterie métalliques pour application hydrogène
Le présent document s’applique aux appareils de robinetterie industrielle métalliques pour usage en hydrogène. Il contient des recommandations et des exigences supplémentaires applicables à la sélection des matériaux, à la conception, à la fabrication et à l’évaluation finale.
Le présent document aborde les quatre services/mécanismes d’endommagement suivants qui pourraient exister en combinaison :
- applications à basses températures ;
- fragilisation environnementale par l'hydrogène (HEE) ou fissuration par l’hydrogène (HIC) ;
- attaque à l’hydrogène à température élevée (HTHA) ;
- service hydrogène avec charges cycliques (fatigue).
Le présent document tient compte de la différence entre l’hydrogène gazeux (GH2) et l’hydrogène liquide (LH2), si nécessaire.
Les dispositions supplémentaires établies dans le présent document ne couvrent pas la corrosion comme la corrosion électrochimique des métaux sous participation d’hydrogène (par exemple, gaz corrosif).
Le présent document se base sur les exigences contenues dans les normes spécifiées ci-dessous :
- applications avec une pression maximale admissible PS supérieure à 0,5 bar conformément à la réglementation européenne pour les équipements sous pression, les dispositions applicables de l’EN 16668 s’appliquent ;
- les exigences supplémentaires pour les appareils de robinetterie dans les applications chimiques et pétrochimiques sont spécifiées dans l’EN 12569 ;
- les exigences supplémentaires pour les appareils de robinetterie dans les systèmes de distribution de gaz sont spécifiées dans l’EN 13774 ;
- les exigences supplémentaires pour les appareils de robinetterie dans les systèmes de transport de gaz sont spécifiées dans l’EN 14141.
Industrijski ventili - Dodatne zahteve za kovinske ventile za vodik
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Industrijski ventili - Dodatne zahteve za kovinske ventile za vodik
Industrial valves - Additional requirements for metallic valves for hydrogen application
Industriearmaturen - Zusätzliche Anforderungen an metallische Armaturen für
Wasserstoffanwendungen
Robinetterie industrielle - Exigences supplémentaires pour les appareils de robinetterie
métalliques pour application hydrogène
Ta slovenski standard je istoveten z: prEN 18191
ICS:
23.060.01 Ventili na splošno Valves in general
27.075 Tehnologija vodika Hydrogen technologies
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2025
ICS 23.060.01; 27.075
English Version
Industrial valves - Additional requirements for metallic
valves for hydrogen application
Robinetterie industrielle - Exigences supplémentaires Industriearmaturen - Zusätzliche Anforderungen an
pour les appareils de robinetterie métalliques pour metallische Armaturen für Wasserstoffanwendungen
application hydrogène
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 18191:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General. 10
5 Hydrogen service (damage mechanisms) . 11
5.1 Metallic materials . 11
5.2 Non-metallic materials . 11
6 General information on material selection for each hydrogen service (damage mechanism)
............................................................................................................................................................................. 11
6.1 Hydrogen in low temperature applications . 11
6.2 Hydrogen Environmental Embrittlement (HEE) . 12
6.2.1 General. 12
6.2.2 Ferritic steels except austenitic ferritic stainless steels . 12
6.2.3 Austenitic stainless steels . 12
6.2.4 Austenitic-ferritic steels . 12
6.2.5 Aluminium and aluminium alloys . 13
6.2.6 Cast irons . 13
6.2.7 Steel casting . 13
6.2.8 Copper and its alloys. 13
6.2.9 Nickel, Nickel alloys, Titanium and Titanium alloys . 13
6.2.10 Zirconium . 13
6.2.11 Other metallic materials . 14
6.3 High temperature hydrogen attack (HTHA) . 14
6.4 Hydrogen service with cyclic loads (fatigue) . 14
6.4.1 General requirements . 14
6.4.2 Fatigue in combination with the other hydrogen services (damage mechanisms) . 14
6.5 Non metallic materials . 14
7 Additional specifications . 15
7.1 Design . 15
7.1.1 General. 15
7.1.2 Design temperature . 15
7.1.3 Hydrogen partial pressure . 15
7.1.4 Tightness aspects . 15
7.2 Materials . 16
7.2.1 General. 16
7.2.2 Metallic and non metallic materials . 17
7.2.3 Delivery conditions of finished valve components . 17
7.3 Manufacture . 18
7.3.1 Welding . 18
7.3.2 Welding consumables . 19
7.3.3 Cold forming . 19
7.3.4 Strain hardening . 19
7.3.5 Hardness . 19
7.3.6 Mechanical properties of welds . 19
7.4 Final assessment . 19
7.5 Marking . 19
Annex A (informative) Harmonized European industrial valve product standards . 20
Annex B (informative) Materials for components of metallic industrial valves intended to be used
in hydrogen applications . 21
B.1 General . 21
B.2 Materials for hydrogen applications . 21
B.3 Overview of valve components made from metals and non-metals . 22
B.4 Operating mechanism sealings and other sealing components . 25
B.5 Operating mechanism sealings and other sealing components . 26
B.6 Lubricants. 26
B.7 Overviews of materials . 27
Annex C (normative) Tightness and additional testing . 56
C.1 General . 56
C.2 Definitions and symbols . 56
C.2.1 Test category . 56
C.2.2 TC Level . 56
C.2.3 Symbol . 56
C.2.4 Actuator . 56
C.3 Options . 56
C.4 Summary of inspection and testing . 57
C.4.1 General . 57
C.4.2 Determination of TC levels . 57
C.4.3 Application examples . 58
C.4.4 Summary of final assessment (inspection and testing) . 60
C.5 Inspection and test procedures, and acceptance criteria . 61
C.5.1 General requirements . 61
C.6 Inspection and test procedures, and acceptance criteria . 61
C.6.1 Shell and seat production test .
...
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