Overview
ISO 13775-2:2016 - Thermoplastic tubing and hoses for automotive use (Part 2: Petroleum-based-fuel applications) specifies test requirements and test methods for extruded thermoplastic tubing and hoses used in petroleum-fuel lines of vehicles with internal‑combustion engines. The standard defines product classification, dimensions, performance tests, marking and test frequencies to ensure safety and durability of automotive fuel hoses.
Key topics and technical requirements
- Scope & construction: Applies to extruded thermoplastic tubes/hoses with or without reinforcement, inner fuel‑resistant veneers and optional outer covers.
- Six product types: Type 1–6 cover tank-to-engine feed/return lines, engine‑compartment lines at moderate/high temperatures, diesel feed lines, and multi‑layer vapour lines.
- Mechanical strength: Minimum burst pressure of 5.5 MPa gauge (55 bar) (ISO 1402).
- Low‑temperature performance: Cold impact resistance at −40 °C with no external cracking and retention of burst strength.
- Ageing & heat resistance: Multiple heat‑ageing schedules (e.g., 1 000 h at 70–125 °C or shorter higher‑temperature cycles) with post‑ageing cold impact retention (ISO 188).
- Fuel resistance: Long‑term exposure tests (SAE J2260) - 1 000 h at 60 °C using specified gasoline, methanol blends, diesel simulants and biofuel blends; must retain impact and adhesion properties.
- Dimensional and swelling limits: Volume change/swelling limits for homogeneous hoses and multi‑layer constructions (ISO 1817).
- Adhesion and layer bonding: For co‑extruded/bonded layers, minimum separation force 1.5 kN/m (ISO 8033).
- Flame resistance: Withstand at least 60 s of flame exposure without pressure loss (Annex C).
- Cleanliness & permeability: Limits on insoluble and fuel‑soluble extractables (Annex D) and fuel permeation limits determined per ISO 8308.
- Electrical & kinking: Maximum electrical resistance and kinking/coefficient of deformation limits per referenced test methods.
- Marking & testing frequency: Continuous marking requirements (manufacturer, ISO number, type, size, “Fuel”, manufacture date) and defined type, routine and production test schedules (Annexes E–G).
Applications and who uses it
- Automotive OEMs: specify compliant thermoplastic fuel lines for gasoline, diesel and blended fuels.
- Hose and tubing manufacturers: design, qualify and mark products to ISO 13775-2:2016.
- Suppliers & tier‑1 integrators: select materials and constructions for fuel-system assemblies.
- Testing laboratories & QA teams: perform type, routine and production tests to verify compliance.
- Regulatory and safety engineers: ensure fuel-line durability, leak prevention and fire safety.
Related standards
Keywords: ISO 13775-2:2016, thermoplastic tubing, automotive fuel hoses, petroleum-based fuel applications, burst pressure, fuel permeability, SAE J2260, OEM compliance.