Gaseous hydrogen land vehicle refuelling connection devices (ISO 17268:2012)

This International Standard 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.
This International Standard applies to refuelling connectors which have working pressures of 11 MPa, 25 MPa,
35 MPa and 70 MPa, hereinafter referred to in this International Standard as the following:
— H11 – 11 MPa at 15 °C;
— H25 – 25 MPa at 15 °C;
— H35 – 35 MPa at 15 °C;
— H35HF – 35 MPa at 15 °C (high flow for commercial vehicle applications);
— H70 – 70 MPa at 15 °C.
Nozzles and receptacles that meet the requirements of this International Standard will only allow GHLVs to be
filled by fuelling stations dispensing hydrogen with nominal working pressures equal to or lower than the vehicle
fuel system working pressure. They will not allow GHLV to be filled by fuelling stations dispensing blends of
hydrogen with natural gas.
Refuelling connectors dispensing blends of hydrogen with natural gas are excluded from the scope of this
International Standard.
NOTE This International Standard can be used for certification purposes.

Gasförmiger Wasserstoff - Anschlussvorrichtungen für die Betankung von Landfahrzeugen (ISO 17268:2012)

Dispositifs de raccordement pour le ravitaillement des véhicules terrestres en hydrogène gazeux (ISO 17268:2012)

L'ISO 17268:2012 définit les caractéristiques de conception, de sécurité et d'exploitation des raccords destinés au ravitaillement des véhicules terrestres à hydrogène gazeux (GHLV).
Les raccords de ravitaillement des GHLV sont constitués des éléments suivants, selon le cas:
- un réceptacle et un bouchon de protection (montés sur le véhicule);
- un embout.
L'ISO 17268:2012 s'applique aux raccords de ravitaillement ayant une pression de service de 11 MPa, 25 MPa, 35 MPa et 70 MPa, désignés dans l'ISO 17268:2012 comme suit:
- H11 - 11 MPa à 15 °C;
- H25 - 25 MPa à 15 °C;
- H35 - 35 MPa à 15 °C;
- H35HF - 35 MPa à 15 °C (haut débit pour applications sur véhicules commerciaux);
- H70 - 70 MPa à 15 °C.
Les embouts et les réceptacles qui satisfont aux exigences de l'ISO 17268:2012 permettront le ravitaillement des GHLV uniquement via des stations de recharge distribuant de l'hydrogène à une pression de service nominale inférieure ou égale à la pression de service du circuit de carburant du véhicule. Ils ne permettront pas le ravitaillement des GHLV via des stations de recharge distribuant des mélanges d'hydrogène et de gaz naturel.
Les raccords de ravitaillement servant à distribuer des mélanges d'hydrogène et de gaz naturel sont exclus du domaine d'application de l'ISO 17268:2012.
NOTE L'ISO 17268:2012 peut être utilisée à des fins de certification.

Plinasti vodik - Priključne naprave za polnjenje goriva v kopenska vozila (ISO 17268:2012)

Ta mednarodni standard opredeljuje načrtovanje, varnost in obratovalne lastnosti priključkov za polnjenje plinastega vodika v kopenska vozila (GHLV). Priključki za polnjenje plinastega vodika v kopenska vozila so sestavljeni iz naslednjih sestavnih delov, kot je ustrezno: – vtičnica in zaščitni pokrov (nameščena na vozilo); – šoba. Ta mednarodni standard se uporablja za priključke za polnjenje z delovnimi tlaki 11 MPa, 25 MPa, 35 MPa in 70 MPa (v nadaljevanju tega mednarodnega standarda: – H11 – 11 MPa pri 15° C; – H25 – 25 MPa pri 15° C; – H35 – 35 MPa pri 15° C; – H35HF – 35 MPa pri 15° C (visok pretok za uporabo pri komercialnih vozilih); – H70 – 70 MPa pri 15° C. Šobe in vtičnice, ki izpolnjujejo zahteve tega mednarodnega standarda, omogočajo polnjenje plinastega vodika v kopenska vozila samo na polnilnih postajah, ki polnijo vodik z nazivnimi delovnimi tlaki, enakimi ali nižjimi od delovnega tlaka sistema za gorivo vozila. S temi šobami in vtičnicami ni mogoče polniti plinastega vodika v kopenska vozila na polnilnih postajah, ki polnijo mešanice vodika in zemeljskega plina. Priključki za polnjenje, ki polnijo mešanice vodika in zemeljskega plina, ne spadajo na področje uporabe tega mednarodnega standarda. OPOMBA: Ta mednarodni standard se lahko uporablja za namene certificiranja.

General Information

Status
Withdrawn
Public Enquiry End Date
31-May-2016
Publication Date
17-Apr-2017
Withdrawal Date
09-Apr-2020
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
10-Apr-2020
Due Date
03-May-2020
Completion Date
10-Apr-2020

Relations

Buy Standard

Standard
SIST EN ISO 17268:2017
English language
42 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 17268:2017
01-maj-2017
3OLQDVWLYRGLN3ULNOMXþQHQDSUDYH]DSROQMHQMHJRULYDYNRSHQVNDYR]LOD ,62

Gaseous hydrogen land vehicle refuelling connection devices (ISO 17268:2012)
Gasförmiger Wasserstoff - Anschlussvorrichtungen für die Betankung von
Landfahrzeugen (ISO 17268:2012)

Dispositifs de raccordement pour le ravitaillement des véhicules terrestres en hydrogène

gazeux (ISO 17268:2012)
Ta slovenski standard je istoveten z: EN ISO 17268:2016
ICS:
43.180 'LDJQRVWLþQDYGUåHYDOQDLQ Diagnostic, maintenance and
SUHVNXVQDRSUHPD test equipment
71.100.20 Industrijski plini Gases for industrial
application
SIST EN ISO 17268:2017 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 17268:2017
---------------------- Page: 2 ----------------------
SIST EN ISO 17268:2017
EN ISO 17268
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2016
EUROPÄISCHE NORM
ICS 43.180; 71.100.20
English Version
Gaseous hydrogen land vehicle refuelling connection
devices (ISO 17268:2012)

Dispositifs de raccordement pour le ravitaillement des Gasförmiger Wasserstoff - Anschlussvorrichtungen für

véhicules terrestres à hydrogène gazeux (ISO die Betankung von Landfahrzeugen (ISO 17268:2012)

17268:2012)
This European Standard was approved by CEN on 8 July 2016.

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, 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: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17268:2016 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 17268:2017
EN ISO 17268:2016 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 17268:2017
EN ISO 17268:2016 (E)
European foreword

The text of ISO 17268:2012 has been prepared by Technical Committee ISO/TC 197 “Hydrogen

technologies” of the International Organization for Standardization (ISO) and has been taken over as EN

ISO 17268:2016 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 2017, and conflicting national standards shall be

withdrawn at the latest by May 2017.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.

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, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 17268:2012 has been approved by CEN as EN ISO 17268:2016 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 17268:2017
---------------------- Page: 6 ----------------------
SIST EN ISO 17268:2017
INTERNATIONAL ISO
STANDARD 17268
Second edition
2012-12-01
Gaseous hydrogen land vehicle refuelling
connection devices
Dispositifs de raccordement pour le ravitaillement des véhicules
terrestres en hydrogène gazeux
Reference number
ISO 17268:2012(E)
ISO 2012
---------------------- Page: 7 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s

member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(E)
Contents Page

Foreword ............................................................................................................................................................................iv

1 Scope ...................................................................................................................................................................... 1

2 Normative references ......................................................................................................................................... 1

3 Terms and definitions ......................................................................................................................................... 2

4 General construction requirements ............................................................................................................... 3

5 Nozzles ................................................................................................................................................................... 3

6 Receptacles ........................................................................................................................................................... 4

7 Design verification test procedures ............................................................................................................... 5

8 Instructions .........................................................................................................................................................13

9 Marking .................................................................................................................................................................14

Annex A (normative) Receptacle/nozzle interface envelope ................................................................................15

Annex B (normative) Hydrogen Receptacles ............................................................................................................16

Annex C (normative) Loose fit test fixtures ..............................................................................................................22

Annex D (normative) Tight fit test fixtures.................................................................................................................27

Annex E (normative) Wear pattern test fixtures .......................................................................................................32

© ISO 2012 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

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.

ISO 17268 was prepared by Technical Committee ISO/TC 197, Hydrogen technologies.

This second edition cancels and replaces the first edition (ISO 17268:2006), which has been technically revised.

iv © ISO 2012 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 17268:2017
INTERNATIONAL STANDARD ISO 17268:2012(E)
Gaseous hydrogen land vehicle refuelling connection devices
1 Scope

This International Standard 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.

This International Standard applies to refuelling connectors which have working pressures of 11 MPa, 25 MPa,

35 MPa and 70 MPa, hereinafter referred to in this International Standard as the following:

— H11 – 11 MPa at 15 °C;
— H25 – 25 MPa at 15 °C;
— H35 – 35 MPa at 15 °C;
— H35HF – 35 MPa at 15 °C (high flow for commercial vehicle applications);
— H70 – 70 MPa at 15 °C.

Nozzles and receptacles that meet the requirements of this International Standard will only allow GHLVs to be

filled by fuelling stations dispensing hydrogen with nominal working pressures equal to or lower than the vehicle

fuel system working pressure. They will not allow GHLV to be filled by fuelling stations dispensing blends of

hydrogen with natural gas.

Refuelling connectors dispensing blends of hydrogen with natural gas are excluded from the scope of this

International Standard.
NOTE This International Standard can be used for certification purposes.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable

for its application. 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 dust for filter evaluation — Part 1: Arizona test dust

ISO 14687-2, Hydrogen fuel — Product specification — Part 2: Proton exchange membrane (PEM) fuel cell

applications for road vehicles

ISO 15501-1, Road vehicles — Compressed natural gas (CNG) fuel systems — Part 1: Safety requirements

© ISO 2012 – All rights reserved 1
---------------------- Page: 11 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
connector
joined assembly of nozzle and receptacle which permits the transfer of hydrogen
3.2
cycle

the process of a making a positive connection between the nozzle and the receptacle, pressurizing to the

maximum working pressure, depressurising and disconnecting
3.3
dry helium

helium with a dew point adequate to prevent condensation during testing and at least 99 % pure

3.4
dry hydrogen
hydrogen which meets or exceeds the quality level in ISO 14687-2
3.5
leak test gas

gas for testing leaks that consists of dry hydrogen, or dry helium, or blends of a minimum 10 % of hydrogen or

helium with nitrogen.
3.6
maximum working pressure

maximum pressure that a connector will experience in service independent of temperature

NOTE The maximum working pressure is 125 % of the nominal working pressure at 15 °C for the purpose of testing

of nozzles and receptacles in this International Standard.
3.7
nominal working pressure

pressure for which the connector is intended to be operated for a given gas temperature of 15 ºC

NOTE This defines a full tank gas density.
3.8
nozzle

device connected to a fuel dispensing system, which permits the quick connect and disconnect of fuel supply

to the vehicle or storage system
3.9
positive locking means

feature, which requires actuation of an interlocking mechanism to achieve proper connection of the nozzle to

the receptacle before pressure is applied
3.10
protective cap

means to prevent dirt and other contaminants from getting into the inlet of the vehicle receptacle

3.11
receptacle
device connected to a vehicle or storage system which receives the nozzle

NOTE This can also be referred to as a fuelling inlet of gas filling port in other documents.

2 © ISO 2012 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(E)
4 General construction requirements

4.1 Nozzles and receptacles shall be designed in accordance with reasonable concepts of safety, durability

and maintainability.

4.2 Nozzles and receptacles designed and tested in accordance with this International Standard shall

a) prevent hydrogen fuelled vehicles from being filled by fuelling stations with working pressures or flow rates

higher than the vehicle,

b) prevent hydrogen fuelled vehicles from being filled by other compressed gas fuelling stations, 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 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.
5 Nozzles

5.1 Nozzles shall comply 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

© ISO 2012 – All rights reserved 3
---------------------- Page: 13 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(E)

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-pressurising, 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-pressurising 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 properly at ambient temperatures ranging from −40 °C to 50 °C

and at hydrogen gas temperatures ranging from −40 °C to 85 °C.

5.9 The nozzle shall not have any mechanical means of opening the receptacle check valve.

6 Receptacles

6.1 Standard receptacle dimensions: A receptacle shall comply 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.

6.2 Receptacles shall comply with all sections of this International Standard. 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,

4 © ISO 2012 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(E)

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 comply with applicable

abnormal load tests specified in 7.10.
6.9 The receptacle shall be designed to operate properly from −40 °C to 85 °C.
7 Design verification test procedures
7.1 General requirements

Nozzles and receptacles shall meet the requirements of all sections of this International Standard.

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, and

d) test fluids and devices shall be at equilibrium conditions with the test environment at the beginning of all tests.

7.3 Nozzle tests

Nozzle tests shall be performed with the test fixtures identified under Annex C, Annex D or Annex E, as

applicable. 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 been deemed compliant to this International Standard.

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 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.

The test shall be deemed to be successfully passed if the following conditions are met:

— The appearance of the nozzle and receptacle shall be such as to clearly suggest the proper method of use.

— It shall not be possible to deliver gas using any nozzles unless the nozzle and receptacle are connected

properly and positively locked.
© ISO 2012 – All rights reserved 5
---------------------- Page: 15 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(E)

— It shall not be possible to remove a nozzle when the contained pressure is greater than 1,0 MPa.

— Upon disconnection, all types of nozzles shall stop the flow of gas. No hazardous condition shall result

from disconnection. Type C nozzles shall be at 0,5 MPa during this test.

— When the contained pressure is less than or equal to 0,5 MPa, Type A and B nozzles shall be capable of

being disconnected with forces less than 225 N and torques less than 7 N•m.

— On unpressurised devices the axial force to connect and lock or unlock and disconnect the device shall be

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.
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 hours 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 five minutes of removal from the conditioning chamber, then pressurised to maximum working

pressure and subjected to ten additional drops within five further minutes.
Dimensions in metres
Key
1 Support
2 11 mm diameter fuelling hose
3 Nozzle
4 Concrete floor
Figure 1 — Test arrangement for dropping test

Following all drops described previously, the nozzle shall be capable of normal connection to the receptacle.

In addition, the nozzle shall comply with the leakage tests specified in 7.7 and 7.11 as well as the hydrostatic

strength test specified in 7.16.
7.7 Leakage at room temperature

These tests shall be performed to verify leakage rate of nozzle, receptacle, connector and receptacle check

valve at room temperature.

Tests shall be conducted at 0,5 MPa and 150 % of the nominal working pressure. All devices shall be checked

for leakage from the time of connection, through pressurization, to the time of disconnection.

To verify the leakage rate of the nozzle, the receptacle and the connector, pressurized leak test gas shall be

applied to the inlet of the connector, the disconnected nozzle and the outlet of the disconnected receptacle.

6 © ISO 2012 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 17268:2017
ISO 17268:2012(E)

To verify the leakage rate of the receptacle check valve, pressurized leak test gas shall be applied to the inlet of

the connector. The upstream portion of the receptacle shall be quickly depressurized, the nozzle disconnected

and the receptacle check-valve checked for leakage.

Following the tests described above, the nozzle, receptacle, connector and receptacle check valve shall be

bubble free for 1 minute. If bubbles are detected then the leak rate shall be measured by either an external

vacuum test using leak test gas (global accumulation test) or an equivalent method to show that the leak rate

is less than 20 cm /h of hydrogen at 20 °C.

NOTE The permitted leakage rate is applicable to tests with 100 % hydrogen only. Permitted leakage rates for other

gases or gas mixtures are to be converted to an equivalent leakage rate to that for 100 % hydrogen.

7.8 Valve operating handle

This test shall be performed to verify that nozzles equipped with operating handles can withstand a maximum

force without damage.

A 200 N force shall be applied to the valve operating handle at the point furthest away from the axis of rotation

in both the opening and closing directions. The test shall be performed with the nozzle properly connected to

a receptacle, and with the nozzle intentionally, improperly engaged relative to the receptacle.

Following the tests, the nozzle shall maintain safe operating functionality.
7.9 Receptacle vibration resistance

This test shall be performed to verify receptacle and protective cap resistance to vibration.

The receptacle and protective cap shall be secured in a test apparatus and vibrated at each integer frequency

from 5 Hz to 60 Hz for eight minutes at each frequency. The amplitude of the vibration shall be at least 1,5 mm

from 5 Hz to 20 Hz, 1,2 mm from 20 Hz to 40 Hz, and 1 mm from 40 Hz to 60 Hz. The tests shall be conducted

once in the axial direction, and again in the radial direction.

Following the tests, there shall be no visible damage to the receptacle and protective caps. The receptacle

shall comply with all the receptacle leakage tests specified in 7.7 and 7.11 as well as the hydrostatic strength

test specified in 7.16.
7.10 Abnormal loads
This test shall be performed to verify that the nozzle and recept
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.