ISO 20766-10:2019

Overview

ISO 20766-10:2019 - "Road vehicles - Liquefied petroleum gas (LPG) fuel systems components - Part 10: Gas-tight housing" specifies general design, marking and testing requirements for gas-tight housings used in LPG fuel systems for road vehicles (as defined in ISO 3833). The document applies to mono‑fuel, bi‑fuel and dual‑fuel vehicle applications using gaseous fuels in accordance with ISO 9162 and covers service pressures from about 110 kPa (butane-rich at 20 °C) to 840 kPa (propane at 20 °C). All pressure references are gauge pressures unless stated otherwise.

Key topics and requirements

• Scope and exclusions: Applies to gas-tight housings but explicitly excludes fuel containers, stationary gas engines, container mounting hardware, electronic fuel management and refuelling receptacles.
• Design and construction: Components must meet the general provisions of ISO 20766‑1 and ISO 20766‑2 and be compatible with the actual tank connection (sample profile may be used for testing).
• Marking and traceability: Mandatory markings include manufacturer/agent name or trademark, model designation (part number) and working pressure (or working pressure and temperature range). Recommended markings include flow direction, fuel type, electrical ratings, certification symbol, type approval number, serial/date code and a reference to ISO 20766‑10:2019. If marking space is limited, required information must be supplied on the packaging.
• Testing requirements: Prescribed tests include hydrostatic strength and external leakage (and other ISO 20766 series tests as applicable). Hydrostatic strength is tested per ISO 20766‑2 at a test pressure of 50 kPa. External leakage must demonstrate leak‑tightness at 10 kPa (apertures closed), with a maximum permitted leak rate specified in the standard and no permanent deformation. Leak tests are performed at applicable temperatures (20 °C; −40 °C or −20 °C; and 65 °C or 85 °C as relevant).
• Service pressure scaling: Devices outside the nominal service pressure range can be accommodated by adjusting pressures using the appropriate ratio.

Applications and users

• Vehicle OEMs and system integrators specifying or integrating LPG systems for passenger cars, light commercial vehicles and other vehicle types defined in ISO 3833.
• Component manufacturers and suppliers designing gas-tight housings and related LPG components.
• Test laboratories and certification bodies performing hydrostatic, leakage and environmental tests in line with ISO 20766‑2 procedures.
• Aftermarket installers and maintenance personnel who need to verify marking, compatibility and basic leak integrity during fitment or inspection.

Related standards

• ISO 20766‑1 (General requirements and definitions)
• ISO 20766‑2 (Performance and general test methods)
• ISO 3833 (Vehicle types - terms and definitions)
• ISO 9162 (Liquefied petroleum gases - fuel specifications)

Keywords: ISO 20766-10:2019, gas-tight housing, LPG fuel systems components, road vehicles, hydrostatic strength, leakage test, markings, service pressure, mono-fuel, bi-fuel, dual-fuel.