ISO 12619-12:2017

Overview

ISO 12619-12:2017 specifies tests and requirements for gas-tight housings and ventilation hoses used in road-vehicle compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blend fuel systems. It applies to vehicle types defined in ISO 3833 and to vehicles using CGH2 (ISO 14687-1/2) or hydrogen/natural gas blends (ISO 15403-1 / ISO/TR 15403-2). The standard is part of the ISO 12619 series and focuses on containment and safe venting of permeation gas and small leaks from primary pressure-retaining components. All references to pressure are gauge pressures unless stated otherwise.

Key topics and technical requirements

• Scope and exclusions: Not applicable to liquefied hydrogen (LH2) components, fuel containers, stationary engines, mounting hardware, electronic fuel management, refuelling receptacles, or fuel cell vehicles.
• Construction and assembly: Components must meet provisions of ISO 12619-1 and ISO 12619-2 and be assembled so that pressure relief device (PRD) function is not impaired.
• Marking: Components shall be marked to allow traceability - manufacturer name/trademark, model/part number and temperature range. Recommended markings include flow direction, fuel type, certification symbol and reference to ISO 12619-12:2017.
• Leakage testing: Ventilation hoses and housings are tested for external leakage per ISO 12619-2 at specified temperatures and pressures (−40 or −20 °C, 20 °C, 85 °C at 0.05 MPa). Pressure-retaining ventilation passages require additional pressurization tests to manufacturer-specified service pressures.
• Venting ability and pressure retention: Under a simulated internal leak (0.5 g/s nitrogen or dry air), the gas-tight housing or ventilation hose shall not retain more than 50 kPa pressure.
• Pull-off strength: Ventilation hose connections must withstand a tensile load test (static pull at up to 100 N/min) and have a minimum pull-off force of 100 N.
• Test matrix: Table 1 of the standard references applicable functional and environmental tests (leakage, corrosion, ageing, vibration, etc.) as aligned with ISO 12619-2.

Applications and intended users

ISO 12619-12:2017 is intended for:

• Vehicle OEMs and hydrogen fuel system designers specifying gas-tight housings and ventilation hoses for CGH2 and hydrogen/natural gas blends
• Component and hose manufacturers developing compliant parts
• Test laboratories and certification bodies performing type-approval and conformity testing
• Safety engineers and fleet operators implementing safe venting and leak-mitigation strategies

Practical uses include product development, type approval, installation guidance, quality control, and safety validation of hydrogen fueling components.

Related standards

• ISO 12619-1, ISO 12619-2 (series general requirements 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), ISO/TS 15869, ISO/TR 15916

Keywords: ISO 12619-12:2017, gas-tight housing, ventilation hose, CGH2, hydrogen/natural gas blends, leakage testing, venting ability, pull-off, fuel system components.