ISO 12619-10:2017

Overview

ISO 12619-10:2017 specifies tests and requirements for the pressure relief device (PRD) used in compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blend fuel system components for road vehicles. The standard targets PRDs intended for vehicle types defined in ISO 3833 and applies where CGH2 meets ISO 14687‑1 / ISO 14687‑2 and hydrogen/natural gas blends meet ISO 15403‑1 / ISO/TR 15403‑2. It clarifies marking, construction, acceptance testing and functional tests required to ensure safe venting under overpressure or elevated temperature. All pressures in the document are gauge pressures unless stated otherwise.

Key topics and technical requirements

• Scope and applicability
  • Covers PRDs for CGH2 and hydrogen/natural gas blends on road vehicles.
  • Excludes LH2 components, fuel containers, stationary gas engines, mounting hardware, electronic fuel management, refuelling receptacles, and fuel cell vehicles.
• Marking
  • PRDs must be marked with manufacturer/agent identification, fusible material yield or PRD activation temperature, rupture disc pressure/activation pressure, and device type (pressure‑activated, thermally activated, parallel‑combination).
• Construction and assembly
  • PRDs must comply with ISO 12619‑1 and ISO 12619‑2 requirements; integrated components must not interfere with PRD activation.
• Mandatory tests
  • Hydrostatic strength (housing and fusible material) - includes inlet/outlet passage testing and fusible material extrusion limits.
  • Leakage and flow capacity tests to verify sealing and venting performance.
  • Bending moment, impact/drop, and vibration resistance for mechanical integrity.
  • Continued operation, accelerated life, thermal cycling, benchtop activation, and condensate‑corrosion resistance to validate durability and activation behavior.
• Performance criteria
  • Activation pressure and activation/yield temperature are defined and verified; fusible material extrusion thresholds and flow/venting performance are prescribed.

Applications and users

• Vehicle OEMs specifying PRDs for CGH2 or hydrogen‑blended fuel systems.
• Component manufacturers designing or certifying PRDs.
• Test laboratories performing compliance and type‑approval testing.
• Safety and compliance engineers assessing hydrogen fuel system reliability and venting behavior.
• Regulators and certification bodies referencing technical requirements for vehicle safety standards.

Related standards

• ISO 12619‑1 - General requirements and definitions for CGH2 and blends fuel system components
• ISO 12619‑2 - Performance and general test methods
• ISO 3833 - Vehicle categories and definitions
• ISO 14687‑1 / ISO 14687‑2 - Hydrogen fuel quality (CGH2)
• ISO 15403‑1 / ISO/TR 15403‑2 - Natural gas and hydrogen/natural gas blend specifications

ISO 12619‑10:2017 is essential for ensuring safe, reliable pressure relief performance in hydrogen and hydrogen/natural gas blended vehicular fuel systems.