EN 17124:2022

SLOVENSKI STANDARD
01-november-2022
Nadomešča:
SIST EN 17124:2018
SIST ISO 14687-2:2021
Vodik kot gorivo - Specifikacija proizvoda in zagotavljanje kakovosti plinastega
vodika na polnilnih postajah - Gorivne celice z membrano za protonsko izmenjavo
(PEM) za cestna vozila
Hydrogen fuel - Product specification and quality assurance for hydrogen refuelling
points dispensing gaseous hydrogen - Proton exchange membrane (PEM) fuel cell
applications for vehicles
Wasserstoff als Kraftstoff - Produktfestlegung und Qualitätssicherung -
Protonenaustauschmembran (PEM) - Brennstoffzellenanwendungen für
Straßenfahrzeuge
Carburant hydrogène - Spécification de produit et assurance qualité pour les points de
ravitaillement en hydrogène distribuant de l'hydrogène gazeux - Applications des piles à
combustible à membrane à échange de protons (MEP) pour les véhicules
Ta slovenski standard je istoveten z: EN 17124:2022
ICS:
27.075 Tehnologija vodika Hydrogen technologies
43.060.40 Sistemi za gorivo Fuel systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17124
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 75.160.20; 27.075 Supersedes EN 17124:2018
English Version
Hydrogen fuel - Product specification and quality
assurance for hydrogen refuelling points dispensing
gaseous hydrogen - Proton exchange membrane (PEM)
fuel cell applications for vehicles
Carburant hydrogène - Spécification de produit et Wasserstoff als Kraftstoff - Produktfestlegung und
assurance qualité pour les points de ravitaillement en Qualitätssicherung - Protonenaustauschmembran
hydrogène distribuant de l'hydrogène gazeux - (PEM)-Brennstoffzellenanwendungen für Fahrzeuge
Applications des piles à combustible à membrane à
échange de protons (MEP) pour les véhicules
This European Standard was approved by CEN on 24 January 2022.

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, Turkey 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17124:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 5
5 Hydrogen Quality Assurance Methodology . 7
5.1 General Requirements – Potential sources of impurities . 7
5.2 Prescriptive Approach for Hydrogen Quality Assurance . 7
5.3 Risk Assessment for Hydrogen and Quality Assurance . 7
5.4 Impact of impurities on fuel cell power train . 10
6 Hydrogen Quality Control Approaches . 12
6.1 General requirements . 12
6.2 Spot sampling . 12
6.3 Monitoring . 12
7 Routine Quality Control . 12
8 Non-routine Quality Control . 12
9 Non compliances . 13
Annex A (informative) Impact of impurities . 14
Annex B (informative) Example of Supply chain evaluation with regards to potential sources
of impurities . 18
Annex C (informative) Example of Risk Assessment — Centralized production, pipeline
transportation . 23
Bibliography. 31
European foreword
This document (EN 17124:2022) has been prepared by Technical Committee CEN/TC 268 “Cryogenic
vessels and specific hydrogen technologies applications”, 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 September 2022, and conflicting national standards shall
be withdrawn at the latest by September 2022.
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 17124:2018.
This document has been prepared under Mandate M/533 given to CEN by the European Commission and
the European Free Trade Association.
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, Turkey and the United
Kingdom.
1 Scope
This document specifies the quality characteristics of hydrogen fuel dispensed at hydrogen refuelling
stations for use in proton exchange membrane (PEM) fuel cell vehicle systems, and the corresponding
quality assurance considerations for ensuring uniformity of the hydrogen fuel.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological 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
constituent
component (or compound) found within a hydrogen fuel mixture
3.2
contaminant
impurity that adversely affects the components within the fuel cell system or the hydrogen storage
system
Note 1 to entry: An adverse effect can be reversible or irreversible.
3.3
detection limit
lowest quantity of a substance that can be distinguished from the absence of that substance with a stated
confidence limit
3.4
fuel cell system
power system used for the generation of electricity on a fuel cell vehicle, typically containing the following
subsystems: fuel cell stack, air processing, fuel processing, thermal management and water management
3.5
hydrogen fuel index
fraction or percentage of a fuel mixture that is hydrogen
3.6
irreversible effect
effect which results in a permanent degradation of the fuel cell power system performance that cannot
be restored by practical changes of operational conditions and/or gas composition
3.7
on-site fuel supply
hydrogen fuel supplying system with a hydrogen production system in the same site
3.8
off-site fuel supply
hydrogen fuel supplying system without a hydrogen production system in the same site, receiving
hydrogen fuel which is produced out of the site
3.9
particulate
solid or liquid particle (aerosol) that can be entrained somewhere in the delivery, storage, or transfer of
the hydrogen fuel
3.10
reversible effect
effect which results in a non-permanent degradation of the fuel cell power system performance that can
be restored by practical changes of operational conditions and/or gas composition
4 Requirements
The fuel quality requirements at the dispenser nozzle shall meet the requirements of Table 1.
NOTE The fuel specification is not process or feedstock specific. Non-listed contaminants have no guarantee of
being benign.
Table 1 — Fuel quality specifications for PEM fuel cell road vehicle applications
Constituent Characteristics
a
99,97 %
Hydrogen fuel index (minimum mole fraction)
Total non-hydrogen gases 300 μmol/mol
Maximum concentration of individual contaminants
Water (H O) 5 μmol/mol
b
2 μmol/mol
Total hydrocarbons (THC) (Excluding Methane)
Methane (CH ) 100 µmol/mol
Oxygen (O ) 5 μmol/mol
Helium (He) 300 μmol/mol
Nitrogen (N ) 300 μmol/mol
Argon (Ar) 300 μmol/mol
Carbon dioxide (CO ) 2 μmol/mol
c
0,2 μmol/mol
Carbon monoxide (CO)
Total sulfur compounds (H S basis) 0,004 μmol/mol
c
0,2 μmol/mol
Formaldehyde (HCHO)
c
0,2 μmol/mol
Formic acid (HCOOH)
Ammonia (NH ) 0,1 μmol/mol
d
0,05 μmol/mol
Halogenated compounds (Halogenate ion basis)
Maximum particulates concentration 1 mg/kg
For the constituents that are additive, such as total hydrocarbons and total sulfur
compounds, the sum of the constituents shall be less than or equal to the acceptable limit.
a
The hydrogen fuel index is determined by substracting the “total non-hydrogen gases” in this
table, expressed in mole percent, from 100 mol percent.
b
Total hydrocarbons include oxygenated organic species. Total hydrocarbons shall be measured
on a carbon basis (μmolC/mol).
c
Total of CO, HCHO, HCOOH shall not exceed 0,2 µmol/mol.
d
All halogenated compounds which could potentially be in the hydrogen gas (for example,
hydrogen chloride (HCl), and organic halides (R-X)) should be determined according to the hydrogen
quality assurance discussed in Clause 5 and the sum shall be less than 0,05 µmol /mol).
5 Hydrogen Quality Assurance Methodology
5.1 General Requirements – Potential sources of impurities
A quality assurance plan for the entire supply chain shall be created to ensure that the hydrogen quality
will meet the requirements listed in Clause 4. The methodology used to develop the quality assurance
plan can vary but shall include one of the two approaches described in this document. The general
description of these two approaches are described in 5.2 and 5.3.
For a given Hydrogen Refuelling Station (HRS), the contaminants listed in the hydrogen specification
referred to Table 1 could be present. There are several parts of the supply chain where impurities can be
introduced. Annex B describes potential impurities at each step of the supply chain.
When a contaminant is classified as potentially present, it shall be taken into account in the Quality
Assurance methodology (risk assessment or prescriptive approach) described below.
5.2 Prescriptive Approach for Hydrogen Quality Assurance
A prescriptive approach can be applied for clearly identified supply chains. The prescriptive approach is
not defined in this document.
5.3 Risk Assessment for Hydrogen and Quality Assurance
Risk assessment consists of identifying the probability of having each impurity above the threshold
values of specifications given in Table 1 and evaluating the severity of each impurity for the fuel cell car.
As an aid to clearly defining the risk(s) for risk assessment purposes, three fundamental questions are
often helpful:
— What might go wrong: which event could cause the impurities to be above the threshold value?
— What is the likelihood (probability of occurrence) that impurities cou
...