Overview
ISO 19013-1:2019 specifies requirements for rubber hoses and tubing used in diesel fuel circuits for internal combustion engines, including compatibility with biodiesel (FAME) up to 20% by volume. The standard defines materials, dimensions, performance tests, marking and classification so manufacturers, OEMs and test labs can verify that fuel lines perform reliably across temperature and pressure ranges typical of vehicle fuel systems.
Key topics and technical requirements
- Scope & classification
- Defines product types (Types 1–4) and Classes A/B for different applications (feed/return lines, engine compartment, filler/vent) with continuous temperature ranges and working pressures.
- Pressure & temperature ratings
- Example working pressures: Class A up to 0.7 MPa (7 bar), Class B up to 0.2 MPa (2 bar); Type 4 low-pressure lines ~0.12 MPa (1.2 bar).
- Continuous temperature windows up to +125 °C for high-temperature types.
- Dimensions & tolerances
- Standardized inside diameters, wall thicknesses and concentricity (see Tables 1–3 in standard).
- Performance tests (selection by application)
- Burst pressure (ISO 1402) with minimums per type/class and requirement to retain ≥75% of original burst after fuel exposure.
- Adhesion between bonded layers ≥ 1.5 kN/m (ISO 8033).
- Low-temperature flexibility (ISO 10619-2) - no cracking at −40 °C.
- Fuel resistance (SAE J2260) for 5 000 h at 80 °C including biodiesel blends.
- Ozone resistance, heat-ageing (ISO 188), kinking, suction, internal cleanliness limits and extractables.
- OEM customization
- Can be used as a classification system for OEM “line call-outs” (Annex E); custom hoses may carry OEM marking rather than the ISO number.
- Testing annexes
- Normative and informative annexes cover cleanliness, tear resistance, surface contamination, life-cycle, type approval and production tests.
Applications and users
- Primary users: automotive OEMs, hose and tubing manufacturers, quality/validation engineers, test laboratories and suppliers for fuel-system components.
- Practical uses:
- Specifying fuel lines for light- and heavy-duty diesel vehicles, off-highway engines and replacement parts.
- Establishing test programs for production acceptance, type approval and material selection.
- Ensuring compatibility with biodiesel blends and regulatory/security requirements in fuel systems.
Related standards (examples)
- ISO 1402 (hydrostatic testing), ISO 1817 (effect of liquids), ISO 10619 (flexibility), ISO 8033 (adhesion), SAE J2260 (fuel system tubing test), EN 14214 (FAME diesel fuel).
Keywords: ISO 19013-1:2019, rubber hoses, fuel circuits, diesel fuels, biodiesel, OEM hose specification, burst pressure, fuel resistance, hose testing.