ISO 8469:2021

Overview

ISO 8469:2021 specifies requirements and test methods for non‑fire‑resistant fuel hoses used in permanently installed fuel systems on small craft (≤ 24 m). The standard covers hoses for conveying petrol (including ethanol blends) and diesel (including FAME blends) with defined maximum working pressures (0.34 MPa for inner diameters ≤ 10 mm; 0.25 MPa for hoses up to 63 mm). ISO 8469:2021 focuses on material performance, durability and fuel permeation rather than fire resistance.

Key topics and technical requirements

• Scope & applicability: Hoses for permanently installed small‑craft fuel systems carrying petrol/petrol‑ethanol and diesel/FAME blends.
• Working pressure limits: 0.34 MPa (≤10 mm ID) and 0.25 MPa (≤63 mm ID).
• Physical tests on finished hose (new samples for each test):
  • Bursting pressure after 40 days conditioning in test fuel (1.4 MPa for ID ≤10 mm; 1.0 MPa for ID >10 mm).
  • Vacuum collapse (ISO 7233) with specified vacuum levels depending on inner diameter.
  • Volume swell after 40 days at 40 °C: tube ≤ 35% increase; cover (if different material) ≤ 120%.
  • Mass reduction of tube ≤ 8% after fuel exposure (40 days at 40 °C).
  • Ozone resistance (ISO 7326): no visible cracks at 7× magnification.
  • Fuel permeation classification (see Annex A):
    • Type 15: ≤ 15 g/m² per 24 h
    • Type 1: > 15 and