ISO 22760-9-2024 PDF

Full title and description

St ISO 22760-9-2024 — Road vehicles — Dimethyl Ether (DME) fuel system components — Part 9: Pressure relief device (PRD). This part of the ISO 22760 series specifies definitions, general requirements and design principles for pressure relief devices intended to limit internal pressure of DME fuel containers used on road vehicles, and sets out marking and instruction requirements for those devices.

Abstract

This document defines the purpose, functional requirements and basic design principles for pressure relief devices (PRDs) for dimethyl ether (DME) fuel containers fitted to motor vehicles (as defined in ISO 3833). It covers required information, marking and instructions, and identifies exclusions (for example stationary, ship, rail or aircraft installations, container-mounting hardware and electronic fuel management). All pressures in the document are gauge pressures unless otherwise stated.

General information

• Status: Published
• Publication date: 17 May 2024
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 43.060.40 (Fuel systems)
• Edition / version: Edition 1 (2024)
• Number of pages: 9

Scope

Specifies definitions of and general requirements to a pressure relief device (PRD) that limits internal pressure of dimethyl ether (DME) fuel containers intended for use on road vehicle types defined in ISO 3833. Applicable to vehicles using gaseous fuels in accordance with ISO 16861. Excludes fuel containers for non-vehicle applications, stationary/ship/railroad/aircraft DME engine installations, container mounting hardware and electronic fuel management systems.

Key topics and requirements

• Definitions and terminology specific to PRDs for DME fuel containers.
• General performance and functional requirements to prevent overpressure and to operate reliably under vehicle conditions.
• Design principles addressing safe pressure-limiting action, materials compatibility with DME, and prevention of unintended leakage or activation.
• Marking and labelling requirements (identification, rated pressures, manufacturer information).
• Instructions for installation, use, inspection and maintenance to ensure safe operation throughout service life.
• Reference to gauge-pressure conventions and cross-references to applicable test methods and performance parts of the ISO 22760 series.

Typical use and users

Used by OEMs and tier‑1/2 manufacturers of DME fuel system components, designers and engineers of vehicle fuel systems, conformity assessment and test laboratories, regulatory bodies and safety assessors, and purchasers specifying component acceptance criteria for DME-powered road vehicles.

Related standards

Part of the ISO 22760 series (DME fuel system components). Relevant related documents include ISO 22760-1 (general requirements and definitions, 2019), ISO 22760-2 (performance and general test methods, 2019), ISO 22760-3 (85% stop valve, 2024), ISO 22760-4 (level indicator, 2024), ISO 22760-6 (pressure relief valve, 2024) and parts/amendments published thereafter. Also related: ISO 16861 (gaseous fuels — vehicle applications) and ISO 3833 (vehicle category definitions).

Keywords

Dimethyl ether (DME), pressure relief device, PRD, fuel system components, road vehicles, ISO 22760, marking, instructions, gauge pressure, fuel safety.

FAQ

Q: What is this standard?

A: ISO 22760-9:2024 is the part of the ISO 22760 series that sets definitions, general requirements and design/marking/instruction requirements for pressure relief devices (PRDs) used on DME fuel containers for road vehicles.

Q: What does it cover?

A: It covers functional requirements, basic design principles, and required marking and user/installation instructions for PRDs intended to limit internal pressure in vehicle-mounted DME fuel containers. It also lists applications and installations to which it does not apply.

Q: Who typically uses it?

A: Vehicle and component manufacturers, system designers, test laboratories, certification bodies, regulators and procurement/specification teams for DME vehicle fuel systems.

Q: Is it current or superseded?

A: The standard was published on 17 May 2024 and is current. An amendment (Amendment 1) was issued in January 2026 to update/clarify limited items; users should apply the base standard together with any published amendments (for example the 2026 amendment) when specifying or demonstrating conformity.

Q: Is it part of a series?

A: Yes — ISO 22760 is a multi‑part series covering DME fuel system components; Part 9 sits alongside other parts addressing stop valves, level indicators, pressure relief valves and general test methods.

Q: What are the key keywords?

A: DME, pressure relief device, PRD, fuel system components, ISO 22760, road vehicles, marking, gauge pressure.