EN ISO 17268:2020

Gaseous hydrogen land vehicle refuelling connection devices (ISO/FDIS 17268:2019)

This document defines the design, safety and operation characteristics of gaseous hydrogen land vehicle (GHLV) refuelling connectors.
GHLV refuelling connectors consist of the following components, as applicable:
—     receptacle and protective cap (mounted on vehicle);
—     nozzle;
—     communication hardware.
This document is applicable to refuelling connectors which have nominal working pressures or hydrogen service levels up to 70 MPa.
This document is not applicable to refuelling connectors dispensing blends of hydrogen with natural gas.

Anschlussvorrichtungen für die Betankung von Landfahrzeugen mit gasförmigem Wasserstoff (ISO 17268:2020)

Dieses Dokument legt die Auslegung, die Sicherheit und die betrieblichen Eigenschaften von Anschlüssen zur Betankung von Landfahrzeugen, die mit gasförmigem Wasserstoff (GHLV; en: gaseous hydrogen land vehicle) betrieben werden, fest.
GHLV-Betankungsanschlüsse bestehen ggf. aus den folgenden Bauteilen:
—   Empfängerstutzen und Schutzkappe (am Fahrzeug angebracht);
—   Füllstutzen;
—   Kommunikations-Hardware.
Dieses Dokument gilt für Betankungsanschlüsse mit Nennbetriebsdrücken oder Wasserstoffbetriebsstufen von bis zu 70 MPa.
Betankungsanschlüsse zur Abgabe von Wasserstoff-Erdgas-Gemischen sind vom Anwendungsbereich dieses Dokuments ausgeschlossen.

Dispositifs de raccordement pour le ravitaillement des véhicules terrestres en hydrogène gazeux (ISO/FDIS 17268:2019)

Le présent document définit les caractéristiques de conception, de sécurité et d'exploitation des connecteurs destinés au ravitaillement des véhicules terrestres à hydrogène gazeux (GHLV).
Les connecteurs de ravitaillement des GHLV sont constitués des éléments suivants, selon le cas:
—          un réceptacle et un bouchon de protection (montés sur le véhicule);
—          un pistolet;
—          un module de communication.
Le présent document s'applique aux connecteurs de ravitaillement ayant une pression de service nominale ou un niveau de service d'hydrogène ne dépassant pas 70 MPa.
Le présent document ne s'applique pas aux connecteurs de ravitaillement servant à distribuer des mélanges d'hydrogène et de gaz naturel.

Priključne naprave za oskrbo kopenskih vozil s plinastim vodikom (ISO 17268:2020)

General Information

• Status: Withdrawn
• Publication Date: 25-Feb-2020
• Withdrawal Date: 22-Sep-2025
• ICS: 43.180 - Diagnostic, maintenance and test equipment
• ICS: 71.100.20 - Gases for industrial application
• 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: 27-Aug-2025
• Completion Date: 23-Sep-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 ISO 17268:2020 - Gaseous hydrogen land vehicle refuelling connection devices (ISO 17268:2020)

Relations

• Replaces: EN ISO 17268:2016 - Gaseous hydrogen land vehicle refuelling connection devices (ISO 17268:2012)
• Effective Date: 04-Mar-2020
• Replaced By: EN ISO 17268-1:2025 - Gaseous hydrogen land vehicle refuelling connection devices - Part 1: Flow capacities up to and including 120 g/s (ISO 17268-1:2025)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN ISO 17268:2017
Priključne naprave za oskrbo kopenskih vozil s plinastim vodikom (ISO
17268:2020)
Gaseous hydrogen land vehicle refuelling connection devices (ISO 17268:2020)
Gasförmiger Wasserstoff - Anschlussvorrichtungen für die Betankung von
Landfahrzeugen (ISO 17268:2020)
Dispositifs de raccordement pour le ravitaillement des véhicules terrestres en hydrogène
gazeux (ISO 17268:2020)
Ta slovenski standard je istoveten z: EN ISO 17268:2020
ICS:
43.180 Diagnostična, vdrževalna in Diagnostic, maintenance and
preskusna oprema test equipment
71.100.20 Industrijski plini Gases for industrial
application
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 17268
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 43.180; 71.100.20 Supersedes EN ISO 17268:2016
English Version
Gaseous hydrogen land vehicle refuelling connection
devices (ISO 17268:2020)
Dispositifs de raccordement pour le ravitaillement des
véhicules terrestres en hydrogène gazeux (ISO
17268:2020)
This European Standard was approved by CEN on 24 January 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 ISO 17268:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 17268:2020) has been prepared by Technical Committee ISO/TC 197
"Hydrogen technologies" in collaboration with 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 August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
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 ISO 17268:2016.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 17268:2020 has been approved by CEN as EN ISO 17268:2020 without any modification.

INTERNATIONAL ISO
STANDARD 17268
Third edition
2020-02
Gaseous hydrogen land vehicle
refuelling connection devices
Dispositifs de raccordement pour le ravitaillement des véhicules
terrestres en hydrogène gazeux
Reference number
ISO 17268:2020(E)
©
ISO 2020
ISO 17268:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 17268:2020(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General construction requirements . 3
5 Nozzles . 5
6 Receptacles . 7
7 Design verification test procedures. 8
7.1 General requirements . 8
7.2 Test conditions . 8
7.3 Nozzle tests . 8
7.4 Receptacle tests . 8
7.5 User — Machine interface . 8
7.6 Dropping . 9
7.7 Leakage at room temperature . 9
7.8 Valve operating handle .10
7.9 Receptacle vibration resistance .10
7.10 Abnormal loads .10
7.11 Low and high temperatures .11
7.11.1 Purpose .11
7.11.2 General.11
7.11.3 Leakage tests .11
7.11.4 Operation tests .11
7.12 Durability and maintainability .12
7.12.1 Purpose .12
7.12.2 Nozzle durability test .12
7.12.3 Receptacle check valve durability test .13
7.12.4 Receptacle durability test .13
7.12.5 Connected nozzle and receptacle durability test .13
7.13 Sealing material aging test .13
7.13.1 Purpose .13
7.13.2 Oxygen aging test procedure .14
7.13.3 Ozone aging test procedure .14
7.14 Non-metallic material hydrogen resistance test .14
7.15 Electrical resistance .14
7.16 Hydrostatic strength .14
7.17 Corrosion resistance .15
7.17.1 Purpose .15
7.17.2 General.15
7.17.3 Nozzle test .15
7.17.4 Receptacle test .15
7.18 Deformation .15
7.19 Contamination test .15
7.20 Thermal cycle test .16
7.21 Pre-cooled hydrogen exposure test .16
7.22 Misconnected nozzle test .16
7.23 Upward/downward nozzle compatibility test .17
7.23.1 General.17
7.23.2 Upwards nozzle compatibility test .17
7.23.3 Downwards nozzle compatibility test .17
7.24 Washout test .18
7.25 User abuse test .18
ISO 17268:2020(E)
7.26 Freezing test .18
7.27 Rocking test .19
7.28 Communication test.20
8 Instructions .20
9 Marking .21
Annex A (normative) Receptacle/nozzle interface envelope .22
Annex B (normative) Hydrogen receptacles .23
Annex C (normative) Loose fit test fixtures .29
Annex D (normative) Tight fit test fixtures .34
Annex E (normative) Wear pattern test fixtures .39
Annex F (informative) Example hex design .44
Bibliography .45
iv © ISO 2020 – All rights reserved

ISO 17268:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 197, Hydrogen technologies, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC
268, Cryogenic vessels and specific hydrogen technologies applications, in accordance with the Agreement
on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 17268:2012), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Clause 1, Clause 2, 3.1, 4.9. 5.8, 5.9, 5.17, 6.1, 6.9, 7.2, 7.5, 7.7, 7.8, 7.12.2, 7.12.3, 7.12.4, 7.16, 7.22, 7.25,
7.26, 7.27, 7.28, Clause 9, Table 1, Figure 3, Figure 4, Annex A, Annex B, Annex C, Annex D, Annex E and
Annex F have been modified.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
INTERNATIONAL STANDARD ISO 17268:2020(E)
Gaseous hydrogen land vehicle refuelling connection
devices
1 Scope
This document defines the design, safety and operation characteristics of gaseous hydrogen land
vehicle (GHLV) refuelling connectors.
GHLV refuelling connectors consist of the following components, as applicable:
— receptacle and protective cap (mounted on vehicle);
— nozzle;
— communication hardware.
This document is applicable to refuelling connectors which have nominal working pressures or
hydrogen service levels up to 70 MPa.
This document is not applicable to refuelling connectors dispensing blends of hydrogen with natural gas.
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.
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 12103-1, Road vehicles — Test contaminants for filter evaluation — Part 1: Arizona test dust
ISO 15501-1, Road vehicles — Compressed natural gas (CNG) fuel systems — Part 1: Safety requirements
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 http:// www .electropedia .org/
3.1
communication hardware
infrared data association (IrDA) components which are used to transmit signals from the vehicle
(receptacle) (3.15) to the dispenser (nozzle) (3.11) and designed to meet SAE J2799 or equivalent
ISO 17268:2020(E)
3.2
component pressure rating
maximum pressure at which it is permissible to operate a component as specified by the manufacturer
at a specified temperature
Note 1 to entry: Components designed to the maximum allowable pressure per the European Pressure Equipment
Directive (PED) represent the component ratings by the manufacturer that is indicated by the value of “PS.”
Note 2 to entry: See Table 1 for required component pressure ratings for various pressure classes (3.13) of fuelling
connectors (3.3).
Note 3 to entry: Further guidance on dispenser pressure terminology is included in ISO 19880-1.
Table 1 — Dispensing system pressure levels and refuelling connector ratings
NWP (3.10) of vehicle Pressure class (3.13) Maximum operating Minimum dispenser
(receptacle) (3.15) pressure component pressure
or (MOP) (3.9) rating
HSL (3.7) of dispenser (PS)
(nozzle) (3.11)
Equal to NWP of the 1,25 × HSL/1,25 × NWP 1,375 × HSL
vehicle storage system per
Highest fill pressure during Highest permissible set-
vehicle label
normal fuelling point for dispenser pressure
protection in ISO 19880-
1:—, 8.2.2.3
11 MPa H11 13,75 MPa 15,125 MPa
25 MPa H25 31,25 MPa 34,375 MPa
a
35 MPa H35 or H35HF 43,75 MPa 48,125 MPa
70 MPa H70 87,5 MPa 96,25MPa
a
High-flow connectors for heavy-duty commercial vehicles.
3.3
connector
joined assembly of nozzle (3.11) and receptacle (3.15) which permits the transfer of hydrogen
3.4
cycle
process of making a positive connection between the nozzle (3.11) and the receptacle (3.15), pressurizing
to the maximum operating pressure (3.9), depressurizing and disconnecting
3.5
dry helium
helium with a dew point adequate to prevent condensation during testing and at least 99 % pure
3.6
dry hydrogen
hydrogen which meets or exceeds the quality level in ISO 14687-2
3.7
hydrogen service level
HSL
pressure level used to characterize the hydrogen service of the dispenser based on the NWP (3.10)
rating of the vehicle
Note 1 to entry: The numerical value of HSL also matches the number after the “H” in the pressure class (3.13).
Note 2 to entry: HSL is expressed in MPa.
2 © ISO 2020 – All rights reserved

ISO 17268:2020(E)
3.8
leak test gas
gas for testing leaks that consists of dry hydrogen (3.6), or dry helium (3.5), or blends of a minimum
10 % of hydrogen or helium with nitrogen
3.9
maximum operating pressure
MOP
highest pressure that is expected for a component or system during normal operation
Note 1 to entry: Further guidance on dispenser pressure terminology is included in ISO 19880-1.
Note 2 to entry: The maximum operating pressure is 125 % of the nominal working pressure (3.10) or hydrogen
service level (3.7), as applicable, for the purpose of testing of nozzles (3.11) and receptacles (3.15) in this document.
3.10
nominal working pressure
NWP
pressure of a full vehicle compressed hydrogen storage system at a gas temperature of 15 °C
Note 1 to entry: See ECE/TRANS/180/Add. 13 Global Technical Regulation No. 13 clause II-3.37.
Note 2 to entry: See Table 1 for NWPs covered in this document.
Note 3 to entry: Further guidance on pressure terminology is included in ISO 19880-1.
Note 4 to entry: NWP is also known as “settled pressure” in ISO 10286.
3.11
nozzle
device connected to a fuel dispensing system, which permits the quick connect and disconnect of fuel
supply to the vehicle or storage system
3.12
positive locking device
device with the feature which requires actuation of an interlocking mechanism to achieve proper
connection of the nozzle (3.11) to the receptacle (3.15) before pressure is applied
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: See Table 1 for pressure classes of fuelling connectors (3.3).
Note 2 to entry: Further guidance on dispenser pressure terminology is included in ISO 19880-1.
3.14
protective cap
means to prevent dirt and other contaminants from getting into the inlet of the vehicle receptacle (3.15)
3.15
receptacle
device connected to a vehicle or storage system which receives the nozzle (3.11)
Note 1 to entry: This can also be referred to as a fuelling inlet of gas filling port in other documents.
4 General construction requirements
4.1 Nozzles and receptacles shall be designed in accordance with reasonable concepts of safety,
durability and maintainability.
ISO 17268:2020(E)
4.2 Nozzles and receptacles designed and tested in accordance with this document shall
a) prevent hydrogen fuelled vehicles from being filled by fuelling stations with working pressures
and/or flow rates higher than the design values specified for the vehicle;
b) prevent hydrogen fuelled vehicles from being filled by other compressed gas fuelling stations, for
example, natural gas and hydrogen-natural gas blends; and
c) prevent other gaseous fuelled vehicles from being filled by hydrogen fuelling stations.
4.3 Nozzles and receptacles shall be well fitted and manufactured in accordance with good engineering
practice.
4.4 Nozzles and receptacles shall be
a) designed to minimise the possibility of incorrect assembly;
b) designed to be secure against displacement, distortion, warping or other damage;
c) constructed to maintain operational integrity under normal and reasonable conditions of handling
and usage; and
d) designed with no self-evident means of defeating the safety features.
4.5 Nozzles and receptacles shall be manufactured of materials suitable and compatible for use with
compressed hydrogen at the pressure and the temperature ranges to which they will be subjected as
specified in 3.2, 5.8 and 6.9. Materials used in the construction of nozzles, receptacles and protective
caps shall be non-sparking or spark-reducing. All pressure bearing and wetted components shall also be
made from material that is compatible with deionised water. Non-metallic material compatibility shall be
documented by the component manufacturer or an independent third party.
4.6 The nozzle shall be connected to or disconnected from the receptacle without the use of tools.
4.7 The H11 and H25 receptacles shall be mounted on the vehicle in compliance with ISO 15501-1.
All other receptacles shall be mounted on the vehicle in compliance with the envelope requirements
specified in Annex A.
4.8 Protective caps are intended to protect the receptacle from foreign debris and shall not hold
pressure. Resistance shall be appropriate to prevent inadvertent dislodging. All protective caps shall
have a retainer to attach them to the receptacle or vehicle.
4.9 Communications hardware which is supplied by the manufacturer and permanently integrated into
the nozzle shall be attached to the nozzle and subjected to all of the nozzle tests. The communications
hardware shall operate correctly upon completion of the all type and quality testing.
4.10 Nozzles and receptacles defined in this document can be used to fuel different types of GHLVs.
The refuelling stations for these vehicles may have significantly different process limits and refuelling
protocols. The nozzle and receptacle alone may not ensure that a GHLV cannot refuel at an incompatible
station. If this occurs, the GHLV may be exposed to conditions outside of its intended limits, such as fuel
container overheating. If this is a potential problem, the user and station manufacturer should develop
additional controls to mitigate this risk.
4.11 As stated in ECE/TRANS/180/Add. 13 Global Technical Regulation No. 13 (Global technical
regulation on hydrogen and fuel cell vehicles — 19 July 2013), “Assurance of capability to sustain
multiple occurrences of over-pressurization due to fuelling station failure is provided by the requirement
to demonstrate absence of leak in 10 exposures to 150 per cent NWP fuelling.” It is presupposed that
4 © ISO 2020 – All rights reserved

ISO 17268:2020(E)
nozzles and receptacles defined in this document are tested in this way to accommodate similar fuelling
station over-pressurization occurrences.
5 Nozzles
5.1 Nozzles shall be in accordance with the dimensional requirements of 6.1 to ensure proper
interchangeability. Nozzles shall couple with receptacles of equal or higher nominal working pressures
and they shall be designed so that they will not couple with receptacles of lower nominal working
pressures. The nozzle shall extend to within 1 mm of the stop ring for all nominal working pressures.
Nozzles shall be designed so that they will not couple with gaseous fuelled vehicles other than GHLV.
5.2 Nozzles shall be one of the following three types.
a) TYPE A — A nozzle for use with dispensing hoses that may remain fully pressurized at dispenser
shutdown. The nozzle shall not allow gas to flow until a positive connection has been achieved.
The nozzle shall be equipped with an integral valve or valves, incorporating an operating
mechanism which first stops the supply of gas and safely vents the trapped gas before allowing the
disconnection of the nozzle from the receptacle. The operating mechanism shall ensure the vent
connection is open before the release mechanism can be operated and the gas located between the
nozzle shut-off valve and the receptacle check valve is safely vented prior to nozzle disconnection.
b) TYPE B — A nozzle for use with dispensing hoses that may remain fully pressurized at dispenser
shutdown. A separate three-way valve connected directly, or indirectly, to the inlet of the nozzle
shall be used to safely vent trapped gas prior to nozzle disconnection. The nozzle shall not allow
gas to flow until a positive connection has been achieved. Venting shall be achieved prior to
disconnection of the nozzle. External three-way valves shall be constructed and marked so as to
indicate clearly the open, shut and vent positions.
c) TYPE C — A nozzle for use with dispensing hoses which are depressurized (0,5 MPa and below)
at dispenser shutdown. The nozzle shall not allow gas to flow until a positive connection has
been achieved. The function of preventing flow may be controlled by the dispenser as long as it is
receiving a positive connection signal from the nozzle.
5.3 Nozzles shall be designed for a life of 100 000 cycles with manufacturer specified maintenance.
The three-way valve used for actuating Type B nozzles shall meet the same number of cycles as the
nozzle (i.e. 100 000 cycles).
5.4 The act of venting, or de-pressurizing, of the connection space between all nozzle types and
receptacles shall be performed prior to disconnection. A provision shall be made for the venting or de-
pressurizing of all nozzle types to be directed to a safe location.
5.5 The means for attaching the nozzle to the fuel dispensing system hose shall not rely on the joint
between the male and female threads for sealing, such as tapered pipe threads.
5.6 The H11 and H25 nozzles shall fit within the envelope described in ISO 15501-1. All other nozzles
shall fit within the envelope specified in Annex A.
5.7 Nozzles shall have a means to prevent the ingress of solid matter from upstream sources. For
example, the requirement shall be deemed met if the nozzle has a filter upstream of adequate size to
protect its functionality.
5.8 The nozzle shall be designed to operate at ambient temperatures ranging from −40 °C to 65 °C and
at hydrogen gas temperatures ranging from −40 °C to 85 °C.
ISO 17268:2020(E)
5.9 The nozzle shall be designed so that it does not freeze on the receptacle for more than 30 s after
fuelling.
5.10 The nozzle shall not have any mechanical means of opening the receptacle check valve.
5.11 The appearance of the nozzle and receptacle shall be such as to clearly suggest the proper
method of use.
5.12 It shall not be possible to deliver gas using any nozzles unless the nozzle and receptacle are
connected properly and positively locked.
5.13 It shall not be possible to remove a nozzle when the contained pressure is greater than 1,0 MPa.
5.14 Upon disconnection, all types of nozzles shall stop the flow of gas. No hazardous condition shall
result from disconnection.
5.15 Unpressurized nozzles shall require an axial force to connect and lock or unlock and disconnect
the device of less than or equal to 90 N. On a secondary positive locking device which incorporates a
rotary locking mechanism, the torque to lock or unlock the locking means shall not exceed 1 N·m. On
a secondary positive locking device which incorporates an axial locking mechanism, the force to lock or
unlock the locking means shall not exceed 90 N.
5.16 Pressurized Type A and B nozzles shall be capable of being disconnected with forces less than
450 N and torques less than 5 N·m.
5.17 Communication hardware which is supplied with the nozzle by the manufacturer shall be attached
to the nozzle and subjected to the following design verification tests indicated by the corresponding
subclause number:
7.6 Dropping
7.8 Valve operating handle
7.10 Abnormal loads
7.11 Low and high temperatures
7.12 Durability and maintainability
7.17 Corrosion resistance
7.18 Deformation
7.19 Contamination
7.20 Thermal cycle
7.21 Pre-cooled hydrogen exposure
7.25 User abuse
7.26 Freezing
If the communication hardware consists of electrical connectors, wires, covers or infrared (IR) filters,
it shall be included as part of the tests.
If the IrDA receiver is replaceable in the field then the nozzle may be tested without the IrDA receiver.
If the IrDA receiver is integrated into the nozzle or receptacle and cannot be replaced in the field, it
6 © ISO 2020 – All rights reserved

ISO 17268:2020(E)
shall be integrated into the nozzle during the tests. The IrDA transmitter may be tested without being
integrated into a receptacle.
The communication hardware shall be fully operational upon completion of the above design
verification tests as demonstrated by 7.28.
6 Receptacles
6.1 Standard receptacle dimensions: A receptacle shall be in accordance with the design specifications
detailed in Annex B.
NOTE The main O-ring seal for all pressure ratings less than 70 MPa is situated at the leading edge of the
receptacle. For the 70 MPa receptacle, the main O-ring seal is situated in the bore of the receptacle. The 70 MPa
receptacle also includes an O-ring at the leading edge of the receptacle to seal with nozzles having pressure
ratings less than 70 MPa.
In order to address freezing issues, the contact surface area between the nozzle and the receptacle on
the back diameter (25 mm) may be reduced by modifying the shape of the receptacle body in this area.
Annex F shows an example hex design which meets this criterion. The receptacle with the reduced
contact area shall be in accordance with this document.
6.2 Receptacles shall be in accordance with this document. The failure of any test conducted with the
receptacle and nozzle test samples shall constitute a failure of the receptacle design.
6.3 Receptacles shall be designed for a life of 15 000 cycles and 15 years with manufacturer specified
maintenance.
6.4 Receptacle designs, which employ means on the back diameter to accommodate mounting, or for
mounting accessories or marking purposes, shall not have such means extend beyond the back diameter
dimensions of the profile specified in Annex B, as applicable. Acceptable means shall include wrench flats,
protective cap anchoring grooves, use of hex stock, undercutting for marking, and threads for protective
caps. Such receptacle designs shall not compromise proper nozzle interchangeability.
6.5 The receptacle shall be equipped with an internal check valve to prevent the escape of gas. The
check valve shall be of the non-contact type, opening by differential pressure only.
6.6 The means for attaching the receptacle to the vehicle fuel system shall not rely on the joint between
the male and female threads for sealing, such as tapered pipe threads.
6.7 Receptacles shall be designed so that they are either tolerant of solid contamination or have a
means to protect themselves from said contamination to maintain safe functionality. For example, the
requirement shall be deemed met if the receptacle has a filter upstream of adequate size to protect the
functionality of the check valve. A receptacle shall have a means to prevent the ingress of fluids and
foreign matter when disconnected.
6.8 The receptacle shall have provisions to be firmly attached to the vehicle and shall be in accordance
with the applicable abnormal load tests specified in 7.10.
6.9 The receptacle shall be designed to operate at hydrogen gas temperatures ranging from −40 °C
to 85 °C.
ISO 17268:2020(E)
7 Design verification test procedures
7.1 General requirements
Nozzles and receptacles shall meet the requirements of this document.
7.2 Test conditions
Unless otherwise stated
a) tests shall be conducted at 20 °C ± 5 °C;
b) all pressure tests shall be conducted with leak test gas unless otherwise noted;
c) all leak tests shall be conducted with leak test gas;
d) test fluids and devices shall be at equilibrium conditions with the test environment at the beginning
of all tests: and
e) unless otherwise specified, the tolerances for testing temperatures and pressures are:
For low temperatures:  T °C
−3
+3
For high temperatures:  T °C
+3
For pressures:          P % of the stated value
7.3 Nozzle tests
Nozzle tests shall be performed with the test fixtures identified under Annex C, Annex D or Annex E,
as applicable. If a test fixture identified under Annex C, Annex D or Annex E is not specified, then
receptacles specified under Annex B shall be used. A new receptacle test sample shall be used for each
nozzle test. The failure of any test conducted with the nozzle and receptacle test sample shall constitute
a failure of the nozzle design.
7.4 Receptacle tests
Receptacles shall be evaluated with nozzle(s) which have met the requirements of this document. The
failure of any test conducted with the receptacle and nozzle test samples shall constitute a failure of the
receptacle design.
7.5 User — Machine interface
This test shall be performed to verify the connection and disconnection forces and torques of an
unpressurized and pressurized device.
The testing shall be performed at room temperature with the minimum temperature as specified in 5.8.
The disconnection forces and torques shall be applied in a direction that tends to disconnect and release
the nozzle. The torque shall be applied to the disconnection/release actuator or three-way valve. For
example, if there is a handle, the torque shall be applied through axis rotation of the nozzle handle
equal to the exterior handling surface of the nozzle mechanism and in such a direction that tends to
unhook and release the nozzle.
All nozzle types shall be connected to a receptacle using the tight test fixture specified in Annex D. The
gas pressure in the assembly shall be less than 0,1 MPa. The force to connect and lock or unlock shall
meet the requirements in 5.15 and 5.16.
8 © ISO 2020 – All rights reserved

ISO 17268:2020(E)
All nozzle types shall be connected to a receptacle using the loose test fixture specified in Annex C. The
gas pressure in the assembly shall be set to 1,0 MPa. It shall not be possible to remove the nozzle from
the receptacle.
A Type A or B nozzle shall be connected to a receptacle using the loose test fixture specified in Annex C.
The gas pressure in the assembly shall be set to 7,5 MPa, 50 % and 100 % of the hydrogen service level.
Upon disconnection, all types of nozzles shall stop the flow of gas. No hazardous condition shall result
from disconnection.
7.6 Dropping
This test shall be performed to verify that a nozzle can safely withstand a drop of 2 m under –40 °C
conditions.
A nozzle conditioned at –40 °C for 24 h shall be connected to a 5 m length of the appropriately rated
fuelling hose, and then dropped 2 m onto a concrete floor as shown in Figure 1. The nozzle shall be
dropped ten times within 5 min of removal from the conditioning chamber, then pressurized to the
maximum operating pressure and subjected to ten additional drops within another 5 min.
Dimensions in metres
Key
1 support
2 11 mm diameter fuelling hose
3 nozzle
4 concrete floor
Figure 1 — Test arrangement
...