ISO 12619-7:2017

Overview - ISO 12619-7:2017 (Gas injector)

ISO 12619-7:2017 specifies tests and requirements for gas injectors and fuel rail assemblies intended for road vehicles using compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends. The standard applies to vehicles defined in ISO 3833 and to fuels meeting ISO 14687‑1/‑2 (hydrogen) and ISO 15403‑1 / ISO/TR 15403‑2 (natural gas). It defines construction, marking and a suite of functional and environmental tests to validate safe, durable performance of CGH2 and H2/NG blend fuel system components. (All pressures referenced are gauge pressures unless otherwise stated.)

Key topics and technical requirements

• Scope & exclusions: Applicable to injectors and fuel rail assemblies; not applicable to LH2 components, fuel containers, stationary engines, mounting hardware, electronic fuel management, refuelling receptacles or fuel cell vehicles.
• Marking requirements: Manufacturer/agent name, model/part number, working pressure (and temperature range), fuel type; recommended additional markings include flow direction, electrical ratings, certification symbol, type approval number and serial/date code.
• Construction: Injectors shall be closed when de‑energized and must comply with ISO 12619‑1 and ISO 12619‑2 where applicable.
• Pneumatic strength: Two-stage pressure test - apply 2× working pressure for ≥3 min (must remain gas‑tight), then increase up to 4× working pressure until leak or burst. Component must leak before bursting.
• Continued operation (durability):
  • Bench durability: subject to "600 × 10" pulses at working pressure (minimum 50 Hz); leakage and insulation checks at intervals and on completion.
  • Temperature exposure: hot static (140 °C ±2 °C, 16 h), cold static (−40 °C ±2 °C or −20 °C ±2 °C, 16 h), and thermocycling (140 cycles with operation during specified segment).
• Insulation resistance: Test voltage 500 V DC for 60 s (100 V DC for connectors ≤3.8 mm pitch); minimum resistance >10 MΩ.
• Test matrix: Includes leakage, corrosion, ozone/oxygen ageing, heat ageing, vibration, material compatibility, brass compatibility, UV and automotive fluid exposure per ISO 12619‑2 procedures.

Applications - who uses ISO 12619-7

• Component manufacturers (gas injectors, fuel rails) for design validation and production control
• Automotive OEMs integrating CGH2 or H2/NG blend fuel systems
• Test laboratories and certification bodies conducting safety and type‑approval testing
• Compliance and quality engineers ensuring compatibility with hydrogen fuel specifications

Related standards

• ISO 12619-1 (General requirements)
• ISO 12619-2 (Performance and test methods)
• ISO 14687-1 / ISO 14687-2 (Hydrogen fuel quality)
• ISO 15403-1 / ISO/TR 15403-2 (Natural gas fuel quality)
• ISO 3833 (Vehicle types and definitions)

Keywords: ISO 12619-7, gas injector, CGH2, hydrogen/natural gas blends, fuel system components, compressed gaseous hydrogen, pneumatic strength, insulation resistance, bench durability.