EN 17928-3:2024
(Main)Gas infrastructure - Injection stations - Part 3: Specific requirements regarding the injection of hydrogen
General Information
- Abstract
This document establishes specific functional requirements of stations for the injection of hydrogen into transmission and distribution systems for fuel gases (natural gas, biomethane, SNG, hydrogen, fuel gas mixtures, etc.; see Figure 1) in accordance with European technical rules that ensure the interoperability of systems in addition to the general functional requirements of EN 17928 1:2024.
This document complements EN 17928 1:2024 by specifying the technical safety requirements to be observed with respect to the chemical and physical properties of hydrogen.
It furthermore complements the requirements on pipelines specified in EN 12007 3 and EN 1594 by describing the specific requirements with respect to hydrogen.
Additionally, it explains how to handle hydrogen measurements during the course of injection.
Dedicated requirements for the technical equipment of the gas transmission and distribution network for mixing hydrogen as an additive gas into the gas flow after the injection station are not covered by this document. However, requirements for the resulting gas mixture and the related coordination and interfaces between station and network operation are specified in this document.
This document represents the recommendations at the time of its preparation. This document does not apply to injection stations operating prior to the publication of this document.
This document specifies common basic principles for gas infrastructure. Users of this document are expected to be aware that more detailed national standards and/or codes of practice can exist in the CEN member countries. This document is intended to be applied in association with these national standards and/or codes of practice setting out the above-mentioned basic principles.
In the event of terms of additional requirements in national legislation/regulation than in this document, CEN/TR 13737 (all parts) illustrates these terms.
CEN/TR 13737 (all parts) gives:
— legislation/regulations applicable in a member state;
— if appropriate, more restrictive national requirements;
— a national contact point for the latest information.
- Status
- Published
- Publication Date
- 01-Oct-2024
- Technical Committee
- CEN/TC 234 - Gas infrastructure
- Drafting Committee
- CEN/TC 234/WG 6 - Gas Regulation
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 02-Oct-2024
- Due Date
- 10-Aug-2023
- Completion Date
- 02-Oct-2024
Overview - EN 17928-3:2024 (Gas infrastructure - Injection stations - Part 3)
EN 17928-3:2024 specifies the hydrogen‑specific functional and safety requirements for injection stations that feed hydrogen into gas transmission and distribution systems. It complements EN 17928-1:2024 by addressing the chemical and physical characteristics of hydrogen, safety (explosion protection, hazardous area classification), metrology (hydrogen measurement during injection), materials selection, and operational controls needed to ensure safe and interoperable injection of hydrogen into methane‑based and dedicated hydrogen grids.
Key facts:
- Applies to new hydrogen injection stations (not to stations already operating before publication).
- Focuses on station requirements and interfaces with downstream network operation; it does not define dedicated network hardware for post‑injection mixing.
Key topics and technical requirements
- Functional requirements: Implements EN 17928‑1 general rules with hydrogen‑specific adaptations for injection, control and coordination with grid operators.
- Gas properties and limits: Operators must define metrological, chemical and calorific properties and the minimum/maximum hydrogen content allowed; maximum hydrogen content in methane‑based grids must be stated (and may be further restricted by national regulation).
- Mixing and homogeneity: Injection must achieve a homogeneous hydrogen mix at the nearest exit or branch; network operator must monitor and prevent local hydrogen enrichments or reverse‑flow accumulations.
- Explosion protection: Hazardous areas classified per EN IEC 60079‑10‑1; hydrogen safety data and safety‑relevant properties are specified (e.g., LEL 4.0 vol.‑%, UEL 75.6 vol.‑%, ignition energy 0.016 mJ, ignition temp ~560 °C, explosion group IIC).
- Materials and components:
- Consider hydrogen embrittlement and permeation for all pressure‑containing parts.
- Avoid higher strength metallic materials with tensile strength ≥ 800 N/mm² to reduce hydrogen‑induced cracking risk.
- Measurement and control: Metrological requirements for hydrogen content measurement at calibrated points and signals for controlling feed‑in rates.
- Testing & commissioning: Tightness tests, commissioning procedures and coordination with downstream network operators are required.
Practical applications - who uses EN 17928-3:2024
- Gas grid operators and network planners integrating hydrogen into existing natural gas systems
- Designers and engineers of hydrogen injection stations and measuring/control stations
- Safety and compliance officers responsible for explosion protection and hazardous area classification
- Equipment manufacturers (valves, pressure vessels, analyzers) selecting materials compatible with hydrogen
- Regulators and certification bodies assessing conformity with European interoperability and safety rules
Related standards
- EN 17928‑1:2024 (General requirements for injection stations)
- EN 12007‑1 / EN 1594 (Pipeline functional requirements)
- EN 16726 (Gas quality - Group H)
- EN IEC 60079‑10‑1 (Explosive atmospheres classification)
- CEN/TS 17977 (Hydrogen in rededicated gas systems)
- CEN/TR 13737 (national legislation/regulation mapping)
Using EN 17928‑3:2024 helps ensure safe, interoperable hydrogen injection into gas networks while addressing hydrogen‑specific material, measurement and operational risks.
Relations
- Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Refers
CEN/TS 17977:2023 - Gas infrastructure - Quality of gas - Hydrogen used in rededicated gas systems - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 17928-3:2024 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas infrastructure - Injection stations - Part 3: Specific requirements regarding the injection of hydrogen". This standard covers: This document establishes specific functional requirements of stations for the injection of hydrogen into transmission and distribution systems for fuel gases (natural gas, biomethane, SNG, hydrogen, fuel gas mixtures, etc.; see Figure 1) in accordance with European technical rules that ensure the interoperability of systems in addition to the general functional requirements of EN 17928 1:2024. This document complements EN 17928 1:2024 by specifying the technical safety requirements to be observed with respect to the chemical and physical properties of hydrogen. It furthermore complements the requirements on pipelines specified in EN 12007 3 and EN 1594 by describing the specific requirements with respect to hydrogen. Additionally, it explains how to handle hydrogen measurements during the course of injection. Dedicated requirements for the technical equipment of the gas transmission and distribution network for mixing hydrogen as an additive gas into the gas flow after the injection station are not covered by this document. However, requirements for the resulting gas mixture and the related coordination and interfaces between station and network operation are specified in this document. This document represents the recommendations at the time of its preparation. This document does not apply to injection stations operating prior to the publication of this document. This document specifies common basic principles for gas infrastructure. Users of this document are expected to be aware that more detailed national standards and/or codes of practice can exist in the CEN member countries. This document is intended to be applied in association with these national standards and/or codes of practice setting out the above-mentioned basic principles. In the event of terms of additional requirements in national legislation/regulation than in this document, CEN/TR 13737 (all parts) illustrates these terms. CEN/TR 13737 (all parts) gives: — legislation/regulations applicable in a member state; — if appropriate, more restrictive national requirements; — a national contact point for the latest information.
This document establishes specific functional requirements of stations for the injection of hydrogen into transmission and distribution systems for fuel gases (natural gas, biomethane, SNG, hydrogen, fuel gas mixtures, etc.; see Figure 1) in accordance with European technical rules that ensure the interoperability of systems in addition to the general functional requirements of EN 17928 1:2024. This document complements EN 17928 1:2024 by specifying the technical safety requirements to be observed with respect to the chemical and physical properties of hydrogen. It furthermore complements the requirements on pipelines specified in EN 12007 3 and EN 1594 by describing the specific requirements with respect to hydrogen. Additionally, it explains how to handle hydrogen measurements during the course of injection. Dedicated requirements for the technical equipment of the gas transmission and distribution network for mixing hydrogen as an additive gas into the gas flow after the injection station are not covered by this document. However, requirements for the resulting gas mixture and the related coordination and interfaces between station and network operation are specified in this document. This document represents the recommendations at the time of its preparation. This document does not apply to injection stations operating prior to the publication of this document. This document specifies common basic principles for gas infrastructure. Users of this document are expected to be aware that more detailed national standards and/or codes of practice can exist in the CEN member countries. This document is intended to be applied in association with these national standards and/or codes of practice setting out the above-mentioned basic principles. In the event of terms of additional requirements in national legislation/regulation than in this document, CEN/TR 13737 (all parts) illustrates these terms. CEN/TR 13737 (all parts) gives: — legislation/regulations applicable in a member state; — if appropriate, more restrictive national requirements; — a national contact point for the latest information.
EN 17928-3:2024 is classified under the following ICS (International Classification for Standards) categories: 27.190 - Biological sources and alternative sources of energy; 75.200 - Petroleum products and natural gas handling equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 17928-3:2024 has the following relationships with other standards: It is inter standard links to EN IEC 60079-10-1:2021, EN 1594:2024, CEN/TS 17977:2023, EN 12007-1:2012, EN 16726:2025, EN 17928-1:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 17928-3:2024 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2025
Infrastruktura za plin - Postaje za injiciranje - 3. del: Posebne zahteve za injiciranje
vodika
Gas infrastructure - Injection stations - Part 3: Specific requirements regarding the
injection of hydrogen
Gasinfrastruktur - Einspeiseanlagen - Part 3: Spezifische Anforderungen für die
Einspeisung von Wasserstoff
Infrastructures gazières - Stations d'injection - Partie 3 : Exigences spécifiques
concernant l'injection d’hydrogène
Ta slovenski standard je istoveten z: EN 17928-3:2024
ICS:
27.190 Biološki viri in drugi Biological sources and
alternativni viri energije alternative sources of energy
75.180.01 Oprema za industrijo nafte in Equipment for petroleum and
zemeljskega plina na splošno natural gas industries in
general
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 17928-3
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2024
EUROPÄISCHE NORM
ICS 75.200
English Version
Gas infrastructure - Injection stations - Part 3: Specific
requirements regarding the injection of hydrogen
Infrastructures gazières - Stations d'injection - Partie 3 Gasinfrastruktur - Einspeiseanlagen - Part 3:
: Exigences spécifiques concernant l'injection de gaz Spezifische Anforderungen für die Einspeisung von
combustible hydrogène Wasserstoff
This European Standard was approved by CEN on 7 July 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17928-3:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
4.1 Specific requirements for hydrogen injection stations . 6
4.2 Coordination and definition of interfaces . 6
4.3 Requirements on the properties of hydrogen . 6
4.3.1 General . 6
4.3.2 Injection of hydrogen into methane-based grids . 6
4.3.3 Injection into dedicated hydrogen grids . 6
4.4 Explosion protection . 7
5 Operational functions . 7
5.1 General . 7
5.2 Mixing hydrogen with other gases . 7
5.2.1 Homogeneity of the gas flow in the gas transmission or distribution system . 7
5.2.2 Control of the hydrogen content . 7
6 Overall safety requirements and protection against inadmissible operating modes . 8
7 Specific requirements for systems and components . 8
7.1 Key parameters for material selection . 8
7.1.1 General . 8
7.1.2 Hydrogen embrittlement (metallic materials) . 8
7.1.3 Hydrogen permeation . 8
7.2 Systems . 8
7.2.1 Potentially hazardous atmosphere . 8
7.2.2 Metrological requirements . 8
7.3 Components - Requirements on buried pipelines . 8
8 Testing and commissioning . 9
8.1 General . 9
8.2 Tightness tests . 9
8.3 Commissioning . 9
9 Operation . 9
Bibliography . 10
European foreword
This document (EN 17928-3:2024) has been prepared by Technical Committee CEN/TC 234 “Gas
infrastructure”, the secretariat of which is held by DIN.
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 April 2025, and conflicting national standards shall be
withdrawn at the latest by April 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 is intended to be used in conjunction with EN 17928-1:2024.
This document is part of the EN 17928 series, Gas infrastructure - Injection stations:
— Part 1: General requirements
— Part 2: Specific requirements regarding the injection of biomethane
— Part 3: Specific requirements regarding the injection of hydrogen fuel gas (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.
1 Scope
This document establishes specific functional requirements of stations for the injection of hydrogen into
transmission and distribution systems for fuel gases (natural gas, biomethane, SNG, hydrogen, fuel gas
mixtures, etc.; see Figure 1) in accordance with European technical rules that ensure the interoperability
of systems in addition to the general functional requirements of EN 17928-1:2024.
This document complements EN 17928-1:2024 by specifying the technical safety requirements to be
observed with respect to the chemical and physical properties of hydrogen.
It furthermore complements the requirements on pipelines specified in EN 12007-3 and EN 1594 by
describing the specific requirements with respect to hydrogen.
Additionally, it explains how to handle hydrogen measurements during the course of injection.
Key
1 injection station – scope of this document
2 gas transmission and distribution system
3 measuring and control station – pressure control/ compression / flow control / metering/ analysing/ gas-
mixing (optional)
4 hydrogen pipeline (optional mixed-gas pipeline)
5 hydrogen production
6 gas composition / flow information
7 gas-feed for mixing (optional)
Figure 1 — Injection station for hydrogen
Dedicated requirements for the technical equipment of the gas transmission and distribution network
for mixing hydrogen as an additive gas into the gas flow after the injection station are not covered by this
document. However, requirements for the resulting gas mixture and the related coordination and
interfaces between station and network operation are specified in this document.
This document represents the recommendations at the time of its preparation. This document does not
apply to injection stations operating prior to the publication of this document.
This document specifies common basic principles for gas infrastructure. Users of this document are
expected to be aware that more detailed national standards and/or codes of practice can exist in the CEN
member countries. This document is intended to be applied in association with these national standards
and/or codes of practice setting out the above-mentioned basic principles.
In the event of terms of additional requirements in national legislation/regulation than in this document,
CEN/TR 13737 (all parts) illustrates these terms.
CEN/TR 13737 (all parts) gives:
...