ISO 14469:2017

Overview

ISO 14469:2017 - Road vehicles - Compressed natural gas (CNG) refuelling connector - defines requirements for CNG refuelling nozzles and receptacles used on road vehicles. The standard applies only to devices made entirely of new parts and materials, designed for service pressures of 20 MPa (200 bar) and 25 MPa (250 bar), and intended to use CNG as defined in ISO 15403‑1 / ISO 15403‑2. It specifies standardized mating profiles (size 1: B200 / B250, size 2: C200 / C250), protective caps, and functional compatibility rules that prevent a vehicle from being fuelled by dispensers of higher service pressure.

Key Topics and Technical Requirements

• Scope and applicability: Road-vehicle refuelling connectors for CNG; new and unused components only; compatibility with ISO 15403 gas quality.
• Service pressure classification: Components for 20 MPa (B200/C200) and 25 MPa (B250/C250) systems.
• Mating profiles and dimensions: Standardized nozzle and receptacle geometries to ensure cross-manufacturer compatibility.
• Safety and compatibility: Design features to prevent over-pressurization - allow fueling from dispensers with pressure ≤ vehicle system pressure while blocking higher-pressure dispensers.
• Durability and life cycles:
  • Receptacles: tested for 10 000 connect/disconnect cycles.
  • Nozzles: Class A (high frequency) - 100 000 cycles; Class B (medium frequency) - 20 000 cycles.
• Test requirements (selected): leakage, impact resistance, hydrostatic strength, corrosion resistance (salt spray), low/high temperature performance, durability cycling, electrical resistance, oxygen ageing, deformation, non-igniting evaluation, and tests for pressure‑tight protective caps (PTPC).
• Marking and instructions: Requirements for clear labeling and user instructions to maintain safety and interoperability.

Practical Applications and Users

ISO 14469:2017 is used by:

• Vehicle manufacturers (OEMs) designing CNG vehicles and onboard receptacles.
• Component manufacturers producing CNG nozzles, receptacles, protective caps and fueling equipment.
• Testing and certification laboratories performing conformity, durability and safety testing.
• Fuel dispenser and station equipment suppliers ensuring dispenser-to-vehicle compatibility.
• Fleet operators and regulators who set procurement specifications and safety compliance criteria. Adoption helps ensure safe, interoperable CNG refuelling across public stations, fleet depots and residential settings.

Related Standards (if applicable)

• ISO 15403‑1 / ISO 15403‑2 - CNG fuel quality
• ISO 15500‑2 - CNG fuel system component test methods
• ISO 15501‑1 - CNG fuel system safety requirements
• ISO 188, ISO 1817, ISO 9227 - referenced test methods (rubber ageing, chemical effects, corrosion)

Keywords: ISO 14469:2017, CNG refuelling connector, compressed natural gas, CNG nozzle, receptacle, B200, B250, C200, C250, 20 MPa, 25 MPa, durability testing, interoperability.