Road vehicles - Dimethyl Ether (DME) fuel system components - Part 6: Pressure relief valve (PRV)

This document specifies definitions of and general requirements to a pressure relief valve for limiting internal pressure of dimethyl ether (DME) fuel containers intended for use on the types of motor vehicles as defined in ISO 3833. It also provides general design principles and specifies requirements for instructions and marking. This document is applicable to vehicles using gaseous fuels in accordance with ISO 16861. It is not applicable to the following: a) fuel containers for any application other than as noted above; b) stationary, ship, railroad vehicle or aircraft DME engine installations; c) fuel container mounting hardware; d) parts of vehicle fuel systems other than the fuel container; e) electronic fuel management; f) refuelling receptacles. NOTE 1 It is recognized that miscellaneous component properties not specifically addressed herein can be examined for compliance with the criteria of any applicable part of the ISO 22760 series, including subjecting the component to appropriate functional tests. NOTE 2 All pressures referred to in this document are gauge pressures unless otherwise specified.

Véhicules routiers — Composants des systèmes de combustible Diméthyle Ether (DME) — Partie 6: vannes de contrôle de la surpression

General Information

Status
Published
Publication Date
16-May-2024
Current Stage
6060 - International Standard published
Start Date
17-May-2024
Due Date
27-Jan-2024
Completion Date
17-May-2024

Relations

Effective Date
02-Dec-2023
Effective Date
07-Jan-2025

Overview

ISO 22760-6:2024 specifies requirements for pressure relief valves (PRVs) used to limit internal pressure of dimethyl ether (DME) fuel containers on road vehicles (types defined in ISO 3833). It sets definitions, general design principles, marking and instruction requirements, and a suite of mandatory tests to verify safety and performance for DME fuel systems. The standard applies to vehicles using gaseous fuels in accordance with ISO 16861 and is part of the ISO 22760 series for DME fuel system components.

Key topics and technical requirements

  • Scope and applicability
    • Covers PRVs for vehicle fuel containers using DME; excludes stationary, ship, rail, aircraft installations, electronic fuel management, refuelling receptacles and unrelated vehicle fuel parts.
  • Marking and traceability
    • Components must be marked with manufacturer/agent, model/part number, working pressure (and temperature range), and discharge pressure. Additional recommended markings include flow direction, fuel type (DME), serial/date code and reference to ISO 22760-6.
  • Design principles
    • PRV inlet positioning should avoid contact with the liquid phase of the fuel when possible.
    • Discharge pressure must not exceed the container working pressure.
  • Essential tests (selected)
    • Hydrostatic strength: test at 2.25 × working pressure to verify housing integrity.
    • Leakage: internal and external leakage tests at specified temperatures and pressure factors (e.g., −40/−20 °C, 20 °C, 85 °C with factors such as 0.75×WP, 0.025×WP, 0.05×WP).
    • Continued operation: cyclic venting test - pressurize to discharge pressure, vent, re-seat within 10 s ± 2 s; 600 continuous cycles required.
    • Operational test: measure discharge and re-seating pressures at −40 °C, 20 °C and +85 °C. Initial pressurization to 110% of working pressure; acceptance criteria include ±5% tolerance on advertised discharge pressure and minimum re-seating ratios (e.g., re-seating ≥ 90% of discharge at 20 °C).
  • Production quality
    • Manufacturers must implement continuous production batch inspection and acceptance testing to maintain consistent safety performance.

Applications and users

ISO 22760-6 is used by:

  • PRV and DME fuel component manufacturers for product design, verification and marking.
  • Automotive OEMs and fuel system integrators specifying compliant DME fuel systems.
  • Test laboratories and certification bodies conducting hydrostatic, leakage and functional PRV testing.
  • Regulators, conformity assessors and procurement teams requiring documented safety and traceability for DME vehicle systems.

Related standards

  • ISO 22760-1 (general requirements and definitions)
  • ISO 22760-2 (performance and test methods)
  • ISO 16861 (DME fuel specifications)
  • ISO 3833 (vehicle types)
  • ISO 11114-2 and other referenced material-compatibility and environmental test standards

Keywords: ISO 22760-6, pressure relief valve, PRV, DME, dimethyl ether, fuel system components, hydrostatic strength, leakage test, operational test, vehicle fuel safety.

Standard

ISO 22760-6:2024 - Road vehicles — Dimethyl Ether (DME) fuel system components — Part 6: Pressure relief valve (PRV) Released:17. 05. 2024

English language
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Frequently Asked Questions

ISO 22760-6:2024 is a standard published by the International Organization for Standardization (ISO). Its full title is "Road vehicles - Dimethyl Ether (DME) fuel system components - Part 6: Pressure relief valve (PRV)". This standard covers: This document specifies definitions of and general requirements to a pressure relief valve for limiting internal pressure of dimethyl ether (DME) fuel containers intended for use on the types of motor vehicles as defined in ISO 3833. It also provides general design principles and specifies requirements for instructions and marking. This document is applicable to vehicles using gaseous fuels in accordance with ISO 16861. It is not applicable to the following: a) fuel containers for any application other than as noted above; b) stationary, ship, railroad vehicle or aircraft DME engine installations; c) fuel container mounting hardware; d) parts of vehicle fuel systems other than the fuel container; e) electronic fuel management; f) refuelling receptacles. NOTE 1 It is recognized that miscellaneous component properties not specifically addressed herein can be examined for compliance with the criteria of any applicable part of the ISO 22760 series, including subjecting the component to appropriate functional tests. NOTE 2 All pressures referred to in this document are gauge pressures unless otherwise specified.

This document specifies definitions of and general requirements to a pressure relief valve for limiting internal pressure of dimethyl ether (DME) fuel containers intended for use on the types of motor vehicles as defined in ISO 3833. It also provides general design principles and specifies requirements for instructions and marking. This document is applicable to vehicles using gaseous fuels in accordance with ISO 16861. It is not applicable to the following: a) fuel containers for any application other than as noted above; b) stationary, ship, railroad vehicle or aircraft DME engine installations; c) fuel container mounting hardware; d) parts of vehicle fuel systems other than the fuel container; e) electronic fuel management; f) refuelling receptacles. NOTE 1 It is recognized that miscellaneous component properties not specifically addressed herein can be examined for compliance with the criteria of any applicable part of the ISO 22760 series, including subjecting the component to appropriate functional tests. NOTE 2 All pressures referred to in this document are gauge pressures unless otherwise specified.

ISO 22760-6:2024 is classified under the following ICS (International Classification for Standards) categories: 43.060.40 - Fuel systems. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 22760-6:2024 has the following relationships with other standards: It is inter standard links to ISO 21182:2025, ISO 22760-6:2024/Amd 1:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase ISO 22760-6:2024 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.

Standards Content (Sample)


International
Standard
ISO 22760-6
First edition
Road vehicles — Dimethyl ether
2024-05
(DME) fuel system components —
Part 6:
Pressure relief valve (PRV)
Véhicules routiers — Composants des systèmes de combustible
Diméthyle Ether (DME) —
Partie 6: vannes de contrôle de la surpression
Reference number
© ISO 2024
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Marking . . 2
5 Design and assembly . 2
6 Tests . 2
6.1 Applicability .2
6.2 Hydrostatic strength .3
6.3 Leakage .3
6.4 Continued operation .3
6.5 Operational test .4
6.5.1 General .4
6.5.2 Test procedure.4
7 Production batch inspection and acceptance testing . 4
Bibliography . 5

iii
Foreword
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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 document should be noted. This document was drafted in accordance with the editorial rules of the
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rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
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This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific
aspects for gaseous fuels.
A list of all parts in the ISO 22760 series can be found on the ISO website.
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.

iv
International Standard ISO 22760-6:2024(en)
Road vehicles — Dimethyl ether (DME) fuel system
components —
Part 6:
Pressure relief valve (PRV)
1 Scope
This document specifies definitions of and general requirements to a pressure relief valve for limiting
internal pressure of dimethyl ether (DME) fuel containers intended for use on the types of motor vehicles as
defined in ISO 3833. It also provides general design principles and specifies requirements for instructions
and marking.
This document is applicable to vehicles using gaseous fuels in accordance with ISO 16861. It is not applicable
to the following:
a) fuel containers for any application other than as noted above;
b) stationary, ship, railroad vehicle or aircraft DME engine installations;
c) fuel container mounting hardware;
d) parts of vehicle fuel systems other tha
...

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