EN 17127:2020

Outdoor hydrogen refuelling points dispensing gaseous hydrogen and incorporating filling protocols

This document defines the minimum requirements to ensure the interoperability of hydrogen refuelling points, including refuelling protocols that dispense gaseous hydrogen to road vehicles (e.g. Fuel Cell Electric Vehicles) that comply with legislation applicable to such vehicles.
The safety and performance requirements for the entire hydrogen fuelling station, addressed in accordance with existing relevant European and national legislation, are not included in this document.
NOTE Guidance on considerations for hydrogen fuelling stations is provided in ISO 19880-1:2020.

Wasserstofftankstellen im Außenbereich zur Abgabe gasförmigen Wasserstoffs und Betankungsprotokolle umfassend

Points de ravitaillement en hydrogène en extérieur distribuant de l'hydrogène gazeux et intégrant des protocoles de remplissage

Le présent document définit les exigences minimales permettant de garantir l'interopérabilité des points de ravitaillement en hydrogène intégrant les protocoles de remplissage qui distribuent de l'hydrogène gazeux pour les véhicules routiers (par exemple, les véhicules électriques à pile à combustible) qui sont conformes à la législation applicable à ces véhicules.
Les exigences de sécurité et de performances relatives à toute la station de remplissage d'hydrogène, traitées conformément à la législation européenne et nationale, ne sont pas incluses dans le présent document.
NOTE Les recommandations relatives aux considérations concernant les stations de remplissage d'hydrogène sont fournies dans l'ISO 19880-1:2020.

Zunanje polnilne postaje za plinasti vodik in postopki polnjenja

General Information

• Status: Withdrawn
• Publication Date: 17-Nov-2020
• Withdrawal Date: 13-Apr-2025
• ICS: 27.075 - Hydrogen technologies
• ICS: 71.100.20 - Gases for industrial application
• ICS: 75.200 - Petroleum products and natural gas handling equipment
• Technical Committee: CEN/TC 268 - Cryogenic vessels
• Drafting Committee: CEN/TC 268/WG 5 - Specific hydrogen technologies applications
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 14-Feb-2024
• Completion Date: 14-Apr-2025
• Directive: 2014/94/EU - Directive 2014/94/EU of The European Parliament and of The Council of 22 October 2014 on the deployment of alternative fuels infrastructure
• Mandate: M/533 - [C(2015)1330] Standardisation request addressed to CEN, CENELEC and ETSI in support of the implementation of the Directive 2014/94/EU on the deployment of alternative fuels infrastructure
• Ref Project: SIST EN 17127:2021 - Outdoor hydrogen refuelling points dispensing gaseous hydrogen and incorporating filling protocols

Relations

• Replaces: EN 17127:2018 - Outdoor hydrogen refuelling points dispensing gaseous hydrogen and incorporating filling protocols
• Effective Date: 25-Nov-2020
• Replaced By: EN 17127:2024 - Outdoor hydrogen refuelling points dispensing gaseous hydrogen and incorporating filling protocols
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2021
Nadomešča:
SIST EN 17127:2019
Zunanje polnilne postaje za plinasti vodik in postopki polnjenja
Outdoor hydrogen refuelling points dispensing gaseous hydrogen and incorporating
filling protocols
Gasförmiger Wasserstoff - Betankungsanlagen - Teil 1: Allgemeine Anforderungen
Points de ravitaillement en hydrogène en extérieur distribuant de l'hydrogène gazeux et
intégrant des protocoles de remplissage
Ta slovenski standard je istoveten z: EN 17127:2020
ICS:
27.075 Tehnologija vodika Hydrogen technologies
71.100.20 Industrijski plini Gases for industrial
application
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17127
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 27.075; 71.100.20; 75.200 Supersedes EN 17127:2018
English Version
Outdoor hydrogen refuelling points dispensing gaseous
hydrogen and incorporating filling protocols
Points de ravitaillement en hydrogène en extérieur Gasförmiger Wasserstoff - Betankungsanlagen - Teil 1:
distribuant de l'hydrogène gazeux et intégrant des Allgemeine Anforderungen
protocoles de remplissage
This European Standard was approved by CEN on 18 October 2020.

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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17127:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Abbreviated terms . 8
5 Characteristics and properties of hydrogen refuelling points . 9
5.1 General requirements . 9
5.2 Fuel Quality . 9
5.3 Dispenser process control . 10
5.3.1 General requirements for the fuelling protocol. 10
5.3.2 Fuelling protocol process limits for light duty vehicle dispensing systems . 10
5.3.3 Fuelling protocol process limits for medium and heavy duty vehicle dispensing
systems . 11
5.3.4 Vehicle to station communications . 12
5.3.5 Dispenser Pressure Control Faults and over-pressure protection . 12
5.3.6 Dispenser temperature control faults . 13
6 Inspection and validation of hydrogen refuelling points . 13
6.1 Inspection prior putting into service and periodical inspection . 13
6.2 Minimum Site Acceptance Testing to ensure interoperability . 14
Annex A (informative) Anticipated minimum vehicle characteristics . 16
Annex B (informative) Countermeasures for unsuitable hydrogen fuelling protocols . 18
Bibliography . 19

European foreword
This document (EN 17127:2020) 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 May 2021, and conflicting national standards shall be
withdrawn at the latest by May 2021.
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 17127:2018.
Compared to the previous version, the following changes apply:
— Improvement of the definitions;
— The general requirements of the characteristics and properties of hydrogen refuelling points have
been completed to provide more information;
— Clarification of the fuelling protocols;
— Revision of the acceptable test for the minimum SAT to ensure interoperability;
— Correction of Figure A.1.
This document has been prepared under Mandate M/533 given to CEN by the European Commission and
the European Free Trade Association.
It applies to hydrogen refuelling points dispensing gaseous hydrogen to vehicles compliant with GTR13,
UNECE R134 or Regulation (EC) No 79/2009.
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
Introduction
The European Commission in its standardization request M/533 of March 12th, 2015, aims to ensure that
technical specifications for interoperability of refuelling points are specified in European Standards
compatible with the relevant International Standards. These specifications aim to meet the European
needs, be compatible and aligned as much as possible with relevant International Standards and as far as
possible with existing refuelling infrastructure already in place and leave room to accommodate the
adopted standard to local technical, analytical and regulatory needs. The requested European Standards
aim to be technologically and commercially neutral and based on the know-how currently in possession
of the EU industry and of the public sector on a fair, reasonable and non-discriminatory basis.
According to the legal requirements given in the Alternative Fuels Infrastructure Directive (AFID) and
M/533, European Standards specifying only the required specifications for ensuring the interoperability
of refuelling points have to be provided. European standards and common requirements with respect to
“interoperability” mean the capacity of an infrastructure to supply energy (in this document hydrogen)
that is compatible with all vehicle technologies and allows seamless EU-wide mobility and a clear
definition of fuel pressure and temperature levels and connector designs.
The European Standardization Organizations (ESOs) should adopt European Standards in accordance
with Article 10 of Regulation (EU) No 1025/2012 of the European Parliament and of the Council, and
those standards should be based on current International Standards or ongoing international
standardization work, where applicable.
Direction from the standardization request M/533 for European Standards for hydrogen supply are to
develop European Standards containing technical solutions for interoperability with technical specifications
in regard to Article 5 and point 2 of Annex II, in particular for:
a) outdoor hydrogen refuelling points dispensing gaseous hydrogen;
b) hydrogen purity dispensed by hydrogen refuelling points;
c) fuelling algorithms and equipment of hydrogen refuelling points;
d) connectors for vehicles for the refuelling of gaseous hydrogen.
This document specifies Items a) and c).
Item b) is covered by EN 17124 and Item d) by EN ISO 17268.
1 Scope
This document defines the minimum requirements to ensure the interoperability of hydrogen refuelling
points, including refuelling protocols that dispense gaseous hydrogen to road vehicles (e.g. Fuel Cell
Electric Vehicles) that comply with legislation applicable to such vehicles.
The safety and performance requirements for the entire hydrogen fuelling station, addressed in
accordance with existing relevant European and national legislation, are not included in this document.
NOTE Guidance on considerations for hydrogen fuelling stations is provided in ISO 19880-1:2020.
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 17124, Hydrogen fuel — Product specification and quality assurance — Proton exchange membrane
(PEM) fuel cell applications for road vehicles
EN ISO 17268, Gaseous hydrogen land vehicle refuelling connection devices (ISO17268)
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:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
NOTE Units used in this document follow SI (International System of Units).
3.1
compressed hydrogen storage system
CHSS
hydrogen storage on-board vehicle, as defined in the GTR#13 and UNECE R134
3.2
dispenser
equipment in the dispensing system, including the dispenser cabinet(s) and support structure, that is
physically located in the fuelling area
Note 1 to entry: The hydrogen dispenser typically includes, as a minimum, the fuelling assembly, required
temperature and pressure instrumentation, filters, and the user interface to conduct vehicle fuelling.
Note 2 to entry: The manufacturer of the hydrogen dispenser can elect to include additional equipment in the
dispenser, including the possibility of all equipment in the dispensing system.
3.3
dispenser cabinet
protective housing that encloses process piping and can also enclose measurement, control and ancillary
dispenser equipment
3.4
dispenser fuel pressure
pressure of the hydrogen gas supplied to the vehicle by the refuelling point
Note 1 to entry: See Annex A for discussion of pressure terminology and its application to dispensing systems.
3.5
dispenser fuel temperature
temperature of the hydrogen gas supplied to the vehicle by the refuelling point
3.6
dispensing system
system downstream of the hydrogen supply system comprising all equipment necessary to carry out the
vehicle refuelling operation, through which the compressed hydrogen is supplied to the vehicle
3.7
hydrogen fuelling station
facility for the dispensing of compressed hydrogen vehicle fuel, often referred to as a hydrogen refuelling
station (HRS) or hydrogen filling station, including the supply of hydrogen compression, storage and
dispensing systems
3.8
hydrogen service level
HSL
pressure level in MPa used to characterize the hydrogen service of the dispenser based on the NWP rating
of the vehicle
Note 1 to entry: The numerical value of HSL also matches the number after the “H” in Pressure Class.
Note 2 to entry: See Annex A for application of pressure terminology to hydrogen dispenser systems and vehicles.
3.9
interoperability
capability of a hydrogen dispensing point to supply hydrogen at the fuelling station/vehicle interface that
is compatible with road vehicles and allows seamless EU-wide mobility through applying clear definitions
of connector designs, fuel quality, pressure levels, temperatures and other applicable considerations
3.10
maximum allowable working pressure
MAWP
maximum pressure permissible in a vessel or system at the temperature specified for the pressure
Note 1 to entry: The maximum allowable working pressure may also be defined as the design pressure, the
maximum allowable operating pressure, the maximum permissible working pressure, or the maximum allowable
pressure for the rating of pressure vessels and equipment manufactured in accordance with national pressure
vessel codes.
Note 2 to entry: See Annex A for application of pressure terminology to hydrogen dispenser systems and vehicles.
3.11
maximum/minimum allowable temperature
TS
values of the maximum/minimum temperatures at which safe and good functioning of the component is
ensured and for which it has been designed, as specified by the manufacturer
3.12
maximum developed pressure
MDP
highest pressure expected during fault management by the dispensing system
Note 1 to entry: Per the GTR, the maximum developed pressure is 1,50 × NWP.
Note 2 to entry: The estimate of maximum developed pressure is based on a “worst case” assumptions — the
highest possible setpoint for the pressure protection and maximum allowable values for setpoint accuracy and “lift”
to open the PSV for full relieving.
3.13
maximum fuelling pressure
MFP
maximum pressure applied to the vehicle high pressure hydrogen system during refuelling. The
maximum fuelling pressure is 125 per cent of the Nominal Working Pressure
Note 1 to entry: See GTR#13 Clause II-3.36, on Page 54.
Note 2 to entry: Also referred to as Maximum fill pressure.
3.14
maximum operating pressure
MOP
highest pressure that is expected for a component or system during normal operation
Note 1 to entry: See Annex A for application of pressure terminology to hydrogen dispenser systems and vehicles.
3.15
nominal working pressure
NWP
pressure of a-vehicle CHSS at 100% SOC at a gas temperature of 15 °C
Note 1 to entry: See GTR#13 Clause II-3.37, on Page 54.
Note 2 to entry: For road vehicles, this is typically 35 MPa or 70 MPa.
Note 3 to entry: See Annex A for application of pressure terminology to hydrogen dispenser systems and vehicles.
3.16
pressure class
non-dimensional rating of components that indicates the components are designed to dispense hydrogen
to road vehicles at the required pressure and temperature
Note 1 to entry: The numbers following ‘H’ in the pressure class are numerically the same as HSL, but the HSL
identifies only the level of the dispensing service whereas the pressure class designation shows the component are
fully capable of meeting the pressure and temperature requirements for dispensing hydrogen at the indicated
service level.
Note 2 to entry: See Annex A for application of pressure terminology to hydrogen dispenser systems and vehicles.
3.17
Pressure safety valve
PSV
pressure activated valve that opens at specified set point to protect a system from rupture and re-closes
when the pressure falls below the set point. PSVs protecting the dispensing system can reclose above the
MOP
3.18
refuelling protocol
automated process to ensure safe filling of vehicles, called refuelling algorithms in the Alternative Fuel
Infrastructure Directive (2014/94/EU)
3.19
state of charge
SOC
density (or mass) ratio of hydrogen in the compressed hydrogen storage system (CHSS) between the
actual CHSS condition and the capacity at NWP when the system is equilibrated at 15 °C
Note 1 to entry: SOC is expressed as a percentage and is computed based on the gas density according to formula
below.
Note 2 to entry: The accuracy of the NIST formula has been quantified to be to within 0,01 % from 255 K to
1 000 K with pressures to 120 MPa at the publishing of this document.
ρ PT,
( )
SOC % ×100
( )
ρ NWP,15 °C
( )
(1)
The hydrogen densities at the two major nominal working pressures are:
— density of H2 at 35 MPa and 15 °C = 24,0 g/l;
at 70 MPa and 15 °C = 40,2 g/l
— density of H2
Note 3 to entry: The ρ(P,T) function for hydrogen is available from the National Institute of Standards and
Technology (NIST) at https://nvlpubs.nist.gov/nistpubs/jres/113/6/V113.N06.A05.pdf
3.20
target pressure
dispenser fuel pressure that the hydrogen fuelling protocol targets for the end of refuelling
4 Abbreviated terms
H35 Indication for 35 MPa NWP hydrogen refuelling as defined in EN ISO 17268
H70 Indication for 70 MPa NWP hydrogen refuelling as defined in EN ISO 17268
=
5 Characteristics and properties of hydrogen refuelling points
5.1 General requirements
The hydrogen refuelling point shall be able to refuel hydrogen vehicles certified according to
UNECE R134 or Regulation (EC) No 79/2009 without compromising their specification limits.
NOTE 1 Assumptions made on the minimum characteristics of the hydrogen vehicle necessary to ensure
interoperability with the refuelling points defined in this document are outlined in Annex A.
Hydrogen refuelling points that would potentially be harmful to vehicles compliant with UNECE R134 or
Regulation (EC) No 79/2009 (for example, due to the protocol used) should use countermeasures to
prevent unsafe refuelling from occurring.
NOTE 2 Examples of countermeasures that can be employed to prevent vehicles refuelling at refuelling points
where the protocol could be unsafe for vehicles compliant with UNECE R134 or Regulation (EC) No 79/2009 are
provided in Annex B.
Refuelling points shall provide hydrogen at either H35 and/or H70 (relating to an NWP in the vehicle of
35 MPa and 70 MPa respectively) via appropriately rated components.
The refuelling nozzle shall be compatible with vehicle hydrogen receptacles that comply with
EN ISO 17268.
Instructions for use of the hydrogen refuelling point by the general public shall be included on or in the
vicinity of each dispenser. The fuel (i.e. hydrogen) and pressure class shall be clearly indicated. Dispenser
operation instructions for dispensing hydrogen into a vehicle may be displayed as markings or as an
electronic display at the dispenser.
These instructions shall include prohibitions against:
— the use of adapters (e.g. 35 MPa vehicle refuelling from 70 MPa nozzle, or alternative fuel nozzles);
— the refuelling of cylinder systems (whether in a vehicle or not) that are incompatible with the fuelling
protocol employed at the refuelling point, see 5.3.
NOTE 3 EN 16942 includes information on labelling requirements for hydrogen refuelling points, and hydrogen
vehicles, in Europe
5.2 Fuel Quality
The hydrogen quality at the nozzle shall meet the requirements of EN 17124.
To prevent hydrogen containing function-impairing impurities (i.e. particulates) that would affect the
high pressure hydrogen system of the vehicle, specifically the vehicle CHSS valves, hydrogen filters shall
be included as part of the dispenser. There shall be a filter with a capability to prevent particulates of a
maximum size of 5 µm with a minimum removal efficiency of 99 % under expected process conditions,
or alternatively a 5 µm filter. The filter shall be installed downstream of dispenser components which
could create particulates, such as a heat exchanger, flow controller, valves, etc. and be as close as possible
to the nozzle or hose breakaway device. This shall filter out the particulate concentration in the hydrogen
as per EN 17124.
All filters located at the nearest side to the nozzle shall be carefully selected by taking the robustness into
account (for example the durability limitations of powdered sintered metal filters).
EN ISO 4022, ISO 12500-1 and ISO 12500-3 provide recommended methodologies for the testing of filter
efficiencies.
5.3 Dispenser process control
5.3.1 General requirements for the fuelling protocol
In order to ensure that the refuelling is conducted within the fuelling protocol process limits for vehicle
compressed hydrogen storage systems, as defined in 5.3.2 or 5.3.3 as applicable, hydrogen dispensing
systems shall either:
— use an approved published fuelling protocol developed by a recognized standards development
organization (SDO), such as SAE J2601
or
— use protocols that have been approved by the manufacturers of each vehicle to fuel at that refuelling
point using that protocol and by regulatory authorities when appropriate. Th
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