NZS ISO 21266.1:2024
Road vehicles – Compressed gaseous hydrogen (CGH2) and hydrogen/ natural gas blends fuel systems Part 1: Safety requirements
Standard specifies the minimum safety requirements for the functionality of compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends on-board fuel systems, intended for use on the types of motor vehicles defined in ISO 3833, Road vehicles – Types – Terms and definitions.
The use of this standard is applicable to vehicles using compressed gaseous hydrogen (CGH2), in accordance
with ISO 14687:2019, Hydrogen fuel quality – Product specification and hydrogen/natural gas blends using natural
gas, in accordance with ISO 15403‑1, Natural gas – Natural gas for use as a compressed fuel for vehicles – Part 1:
Designation of the quality.
It is not applicable to the following:
(a) Liquefied hydrogen (LH2) fuel system components;
(b) Fuel containers;
(c) Stationary gas engines;
(d) Container mounting hardware;
(e) Electronic fuel management;
(f) Refuelling receptacles; and
(g) Fuel cell vehicles.
NOTE −
(1) It is recognised that miscellaneous components not specifically covered herein can be examined to meet the criteria of this document and tested according to the appropriate functional tests.
(2) All references to pressure in this document are considered gauge pressures, unless otherwise specified. All matters relating to the skills of installers and converters have been excluded from this document.
The standard was prepared by the P3652 Hydrogen Standards Committee and is identical to and has been
reproduced from ISO 21266-1:2018, Road vehicles – Compressed gaseous hydrogen (CGH2 ) and hydrogen/
natural gas blends fuel systems – Part 1: Safety requirements.
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NZS ISO 21266.1 2024
Committee representation
Acknowledgement
Copyright
Preface
Contents
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Design
4.1.1 General
4.1.2 Components
4.2 Refuelling connection
4.2.1 General
4.2.2 Receptacle location
4.2.3 Receptacle mounting
4.2.4 Minimum receptacle clearance
4.3 Leakage control
4.4 Mounting of the cylinder(s)
4.5 Heat protection
4.6 Minimizing risk of gas ignition
4.7 Venting system
4.7.1 General requirements
4.7.2 Ventilation lines for PRDs and PRVs
5 Instruction for use
6 Marking
Annex A (informative) Technical solutions to functional requirements
Annex B (informative) Compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends on-board fuel systems
Bibliography
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NZS ISO 21266.1 2024
Committee representation
Acknowledgement
Copyright
Preface
Contents
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Design
4.1.1 General
4.1.2 Components
4.2 Refuelling connection
4.2.1 General
4.2.2 Receptacle location
4.2.3 Receptacle mounting
4.2.4 Minimum receptacle clearance
4.3 Leakage control
4.4 Mounting of the cylinder(s)
4.5 Heat protection
4.6 Minimizing risk of gas ignition
4.7 Venting system
4.7.1 General requirements
4.7.2 Ventilation lines for PRDs and PRVs
5 Instruction for use
6 Marking
Annex A (informative) Technical solutions to functional requirements
Annex B (informative) Compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends on-board fuel systems
Bibliography
NZS ISO 21266.1:2024
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.