ISO 12619-1:2014

INTERNATIONAL ISO
STANDARD 12619-1
First edition
2014-06-15
Road vehicles — Compressed gaseous
hydrogen (CGH2) and hydrogen/
natural gas blend fuel system
components —
Part 1:
General requirements and definitions
Véhicules routiers — Composants des circuits d’alimentation pour
hydrogène gazeux comprimé (CGH2) et mélanges de gaz naturel et
hydrogène —
Partie 1: Exigences générales et définitions
Reference number
ISO 12619-1:2014(E)
©
ISO 2014

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ISO 12619-1:2014(E)

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ii © ISO 2014 – All rights reserved

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ISO 12619-1:2014(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Construction and assembly . 4
5 Electrical equipment and wiring . 5
6 Instructions . 5
7 Marking . 6
Bibliography . 8
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ISO 12619-1:2014(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 25, Vehicles
using gaseous fuels.
ISO 12619 consists of the following parts, under the general title Road vehicles — Compressed gaseous
hydrogen (CGH2) and hydrogen/natural gas blends fuel system components:
— Part 1: General requirements and definitions
— Part 2: Performance and general test methods
— Part 3: Pressure regulator
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INTERNATIONAL STANDARD ISO 12619-1:2014(E)
Road vehicles — Compressed gaseous hydrogen
(CGH2) and hydrogen/natural gas blend fuel system
components —
Part 1:
General requirements and definitions
1 Scope
This part of ISO 12619 specifies general requirements and definitions of compressed gaseous hydrogen
(CGH2) and hydrogen/natural gas blends fuel system components, intended for use on the types of motor
vehicles defined in ISO 3833. It also provides general design principles and specifies requirements for
instructions and markings.
This part of ISO 12619 is applicable to vehicles using CGH2 in accordance with ISO 14687-1 or ISO 14687-2
and hydrogen/natural gas blends using natural gas in accordance with ISO 15403-1 and ISO/TR 15403-
2. It is not applicable to the following:
— liquefied hydrogen (LH2) fuel system components;
— fuel containers;
— stationary gas engines;
— container mounting hardware;
— electronic fuel management;
— refuelling receptacles.
NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to
meet the criteria of this part of ISO 12619 and tested according to the appropriate functional tests.
NOTE 2 All references to pressure in this part of ISO 12619 are to be considered gauge pressures unless
otherwise specified.
NOTE 3 This part of ISO 12619 may not apply to fuel cell vehicles in compliance with international regulations.
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 6722-1, Road vehicles — 60 V and 600 V single-core cables — Part 1: Dimensions, test methods and
requirements for copper conductor cables
ISO 6722-2, Road vehicles — 60 V and 600 V single-core cables — Part 2: Dimensions, test methods and
requirements for aluminium conductor cables
ISO 12619-2, Road vehicles — Compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blend fuel
system components — Part 2: Performance and general test methods
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ISO 12619-1:2014(E)

ISO 14687-1, Hydrogen fuel — Product specification — Part 1: All applications except proton exchange
membrane (PEM) fuel cell for road vehicles
ISO 14687-2, Hydrogen fuel — Product specification — Part 2: Proton exchange membrane (PEM) fuel cell
applications for road vehicles
ISO 15403-1, Natural gas — Natural gas for use as a compressed fuel for vehicles — Part 1: Designation of
the quality
ISO/TR 15403-2, Natural gas — Natural gas for use as a compressed fuel for vehicles — Part 2: Specification
of the quality
1)
ISO 16380 , Road vehicles — Blended fuels refuelling connector
ISO 17268, Gaseous hydrogen land vehicle refuelling connection devices
3 Terms and definitions
3.1
agent
person or organization responsible for holding the compliance certificate
3.2
burst pressure
pressure which causes structural failure of the component and consequential inability of the component
to retain hydrogen or hydrogen/natural gas blends
3.3
compressed gaseous hydrogen
CGH2
gaseous hydrogen which has been compressed and stored for use as a vehicle fuel
3.4
filter
component that is intended to remove contaminants from the gas stream
3.5
flexible fuel line
flexible tubing or hose through which gaseous hydrogen or hydrogen/natural gas blend flows
3.6
fitting
connector used in joining a piping, tubing, or hose system
3.7
fuel cell gas injector
device used for introducing gas into the fuel cell
3.8
gas air mixer
device for mixing the gaseous fuel and intake air for the engine
3.9
gas flow adjuster
gas flow restricting device that is installed downstream of a pressure regulator for controlling gas
3.10
gas injector
device for introducing gaseous fuel into the engine or associated intake system
1) To be published.
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ISO 12619-1:2014(E)

3.11
gas tight housing
device which vents gas leakage to outside the vehicle including the gas ventilation hose, the clear opening
2
of which is at least 450 mm
...