ISO 22760-1:2019

Overview

ISO 22760-1:2019 defines general requirements and definitions for Dimethyl Ether (DME) fuel system components used in road vehicles (as defined in ISO 3833). It provides design principles, construction and assembly rules, electrical and wiring requirements, and mandatory instructions and marking. The standard applies to mono-fuel, bi-fuel and dual-fuel vehicles using DME in accordance with ISO 16861 and ASTM D7901. It excludes fuel containers, stationary gas engines, container mounting hardware, electronic fuel management and refuelling receptacles.

Keywords: ISO 22760-1, Dimethyl Ether, DME fuel system, road vehicles, DME components

Key topics and technical requirements

• Scope and definitions: Clear terminology for valves, pumps, fittings, injectors, rail sensors, multivalves, PRV/PRD and vehicle fuel configurations (mono-, bi-, dual-fuel).
• Materials and construction: Components must use materials compatible with DME; non-metallic parts must pass oxygen-ageing and immersion tests referenced in ISO 22760-2.
• Sealing and joints: Gas-tight sealing required; replace tapered thread fittings if joints need disassembly; tank-attached threads must meet international standards.
• Temperature ranges: On-board components must meet specified temperature classes. Example ranges:
  • Engine compartment: moderate −20 °C to 120 °C; cold −40 °C to 120 °C
  • On-board (except engine compartment): −20 °C to 85 °C (moderate) / −40 °C to 85 °C (cold)
  • Container accessories: −20 °C to 65 °C (moderate) / −40 °C to 65 °C (cold)
• Electrical and wiring: Wiring and electrical parts must comply with ISO 6722‑1/6722‑2; DME-containing components must not conduct electrical current; openings require abrasion protection.
• Valve behavior: Automatic tank valves must be normally closed and energized only when the engine is running in DME mode.
• Instructions and marking: Manufacturers must supply clear installation/maintenance instructions and permanently mark components with manufacturer ID, part number, working pressure/temperature, fuel type, electrical ratings, certification symbol, approval number and references to ISO 22760 series.

Practical applications and users

ISO 22760-1 is used by:

• OEMs and vehicle system integrators designing DME-powered vehicles
• Component manufacturers (valves, pumps, filters, lines, sensors)
• Test labs and certification bodies conducting material and functional tests
• Fleet operators and maintenance teams implementing safe installation, servicing and parts replacement
• Regulators and approval authorities assessing conformity and type approval

Benefits include improved safety, interoperability of DME components, consistent marking and documentation, and alignment with fuel specifications (ISO 16861, ASTM D7901).

Related standards

• ISO 22760 (all parts) - DME fuel system components series
• ISO 22760-2 - tests for non-metallic materials (referenced)
• ISO 16861; ASTM D7901 - DME fuel specifications
• ISO 6722-1 / ISO 6722-2 - vehicle single-core cables
• ISO 3833 - vehicle types and definitions

Using ISO 22760-1 helps ensure DME fuel systems meet recognized safety, material and marking expectations for modern road vehicles.