SIST EN 17127:2019

SLOVENSKI STANDARD
SIST EN 17127:2019
01-januar-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 17127:2018
ICS:
27.075 Tehnologija vodika Hydrogen technologies
71.100.20 Industrijski plini Gases for industrial
application
SIST EN 17127:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 17127:2019

---------------------- Page: 2 ----------------------

SIST EN 17127:2019


EN 17127
EUROPEAN STANDARD

NORME EUROPÉENNE

November 2018
EUROPÄISCHE NORM
ICS 27.075; 71.100.20
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 25 June 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17127:2018 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN 17127:2019
EN 17127:2018 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Abbreviated terms . 7
5 Characteristics and properties of hydrogen refuelling points . 7
5.1 General requirements . 7
5.2 Fuel Quality . 8
5.3 Dispenser process control . 8
5.3.1 General requirements for the fuelling protocol. 8
5.3.2 Fueling protocol process . 9
5.3.3 Fuelling protocol process limits for other vehicles . 10
5.3.4 Vehicle to station communications . 10
5.3.5 Dispenser Pressure Control Faults and over-pressure protection . 11
5.3.6 Dispenser temperature control faults . 11
6 Safety of hydrogen refuelling points . 12
6.1 General . 12
6.2 Permitting process . 12
7 Inspection and validation of hydrogen refuelling points . 12
7.1 Inspection prior putting into service and periodical inspection . 12
7.2 Minimum Site Acceptance Testing to ensure interoperability . 12
Annex A (informative) Anticipated minimum vehicle characteristics . 14
Annex B (informative) Counter Measures for Unknown Hydrogen Refuelling Protocols . 15
B.1 General . 15
B.2 Countermeasure examples . 15
Bibliography . 16
2

---------------------- Page: 4 ----------------------

SIST EN 17127:2019
EN 17127:2018 (E)
European foreword
This document (EN 17127:2018) 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 2019, and conflicting national standards shall be
withdrawn at the latest by May 2019.
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 has been prepared under Mandate M/533 given to CEN by the European Commission and
the European Free Trade Association.
It applies to vehicles covered by GTR13.
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, Former Yugoslav Republic of Macedonia, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
the United Kingdom.
3

---------------------- Page: 5 ----------------------

SIST EN 17127:2019
EN 17127:2018 (E)
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 that is compatible with all
vehicle technologies and allows seamless EU-wide mobility and a clear definition of fuel pressure and
1
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
The energy to be supplied is hydrogen as a fuel and this fuel is dispensed in a hydrogen refuelling station
meeting interoperability requirements.
4

---------------------- Page: 6 ----------------------

SIST EN 17127:2019
EN 17127:2018 (E)
1 Scope
This document defines the minimum requirements to ensure the interoperability of public hydrogen
refuelling points including refuelling protocols that dispense gaseous hydrogen to road vehicles (e.g. Fuel
Cell Electric Vehicles) complying with applicable regulations.
The safety and performance requirements for the entire hydrogen refuelling station (HRS), addressed in
accordance with existing relevant European and national legislation, are not included in this document.
NOTE Guidance on considerations for hydrogen refuelling stations (HRS) is provided in ISO/TS 19880-1.
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 (ISO 17268)
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 http://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
3.2
hydrogen refuelling station
HRS
facility for the dispensing of compressed hydrogen vehicle fuel and includes the supply of hydrogen
compression, storage and dispensing systems
3.3
HRS Interoperability
capacity of an infrastructure to supply hydrogen at the HRS/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 and temperatures
5

---------------------- Page: 7 ----------------------

SIST EN 17127:2019
EN 17127:2018 (E)
3.4
maximum allowable working pressure
PS
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.
3.5
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
3.6
maximum operating pressure
MOP
highest pressure that is expected for a component or system during normal operation
3.7
nominal working pressure
NWP
pressure of a full vehicle CHSS 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.
3.8
refuelling protocol
automated process to ensure safe filling of vehicles, called refuelling algorithms in the Alternative Fuel
Infrastructure Directive (2014/94/EU)
3.9
safety distance
distance to acceptable risk level or minimum risk-informed distance between a hazard source and a
target (human, equipment or environment) which will mitigate the effect of a likely foreseeable incident
and prevent a minor incident escalating into a larger incident
3.10
safety measure
measure intended to protect a protected item located outside the facility from the effects of an identifiable
gas leak caused by a malfunction when the facility is not operated as intended
Note 1 to entry: Safety measures include, but are not limited to, safety distances, sufficiently tall pressure relief
lines, firewalls.
6

---------------------- Page: 8 ----------------------

SIST EN 17127:2019
EN 17127:2018 (E)
3.11
state of charge
SOC
ratio of compressed hydrogen storage system (CHSS) hydrogen density to the density at maximum
operating pressure rated at the standard temperature 15 °C, expressed as a percentage and computed
based on the gas density per the formula below:
ρ PT,
( )
SOC % ×100 (1)
( )
ρ NWP,15 °C
( )
Note 1 to entry: The densities of the two major pressure classes at 100 % SOC are:
— density of H2 at 35 MPa and 15 °C = 24,0 g/l;
— density of H2 at 70 MPa and 15 °C = 40,2 g/l.
3.12
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.
3.13
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 definitions of pressure terminology and their application to dispenser system
and filling stations, in general.
4 Abbreviated terms
H35 Indication for 35 MPa NWP hydrogen fuelling as defined in EN ISO 17268
H70 Indication for 70 MPa NWP hydrogen fuelling as defined in EN ISO 17268
5 Characteristics and properties of hydrogen refuelling points
5.1 General requirements
The hydrogen refuelling point will 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.
7
=

---------------------- Page: 9 ----------------------

SIST EN 17127:2019
EN 17127:2018 (E)
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 stations 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.
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 dispensers
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 station
using that protocol and by regulatory authorities when appropriate. The refuelling station operator
shall take measures to prevent the refuelling of vehicles at refuelling point where protocols are not
approved by the manufacturer(s) of the vehicles using that refuelling point.
If the communications fail during fuelling, the station shall either terminate the fuelling within 5 s or the
fuelling may continue without communications if allowed by the fuelling protocol
NOTE Examples of countermeasures that can be employed to prevent vehicles fuelling at stations where the
protocol has not been approved are provided in Annex B.
The fuelling protocol shall ensure that the maximum CHSS material temperature does not exceed 85 °C
throughout the refuelling.
8

---------------------- Page: 10 ----------------------

SIST
...