ISO 21266-1:2018

Road vehicles — Compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends fuel systems — Part 1: Safety requirements

This document specifies the minimum safety requirements applicable 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. It is applicable to vehicles using compressed gaseous hydrogen (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: 1) liquefied hydrogen (LH2) fuel system components; 2) fuel containers; 3) stationary gas engines; 4) container mounting hardware; 5) electronic fuel management; 6) refuelling receptacles; and 7) fuel cell vehicles. NOTE 1 It is recognized 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. NOTE 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.

Véhicules routiers — Systèmes d'alimentation pour hydrogène gazeux comprimé (CGH2) et mélanges d'hydrogène et de gaz naturel — Partie 1: Exigences de sécurité

General Information

• Status: Published
• Publication Date: 25-Sep-2018
• ICS: 43.060.40 - Fuel systems
• Technical Committee: ISO/TC 22/SC 41 - Specific aspects for gaseous fuels
• Drafting Committee: ISO/TC 22/SC 41/WG 7 - General safety requirements for gaseous fuelled vehicles and terminology
• Current Stage: 9060 - Close of review
• Start Date: 04-Mar-2029

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21266-1
First edition
2018-10
Road vehicles — Compressed gaseous
hydrogen (CGH2) and hydrogen/
natural gas blends fuel systems —
Part 1:
Safety requirements
Véhicules routiers — Systèmes d'alimentation pour hydrogène gazeux
comprimé (CGH2) et mélanges d'hydrogène et de gaz naturel —
Partie 1: Exigences de sécurité
Reference number
ISO 21266-1:2018(E)
©
ISO 2018

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ISO 21266-1:2018(E)

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ii © ISO 2018 – All rights reserved

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ISO 21266-1:2018(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 4
4.1 Design . 4
4.1.1 General. 4
4.1.2 Components . 5
4.2 Refuelling connection . 6
4.2.1 General. 6
4.2.2 Receptacle location . 7
4.2.3 Receptacle mounting . 7
4.2.4 Minimum receptacle clearance . 7
4.3 Leakage control . 7
4.4 Mounting of the cylinder(s) . 8
4.5 Heat protection . 9
4.6 Minimizing risk of gas ignition . 9
4.7 Venting system .
...