Overview
ISO 2929:2021 - "Rubber hoses and hose assemblies for bulk fuel delivery by truck - Specification" defines performance, construction and testing requirements for rubber delivery and suction/delivery hoses used on tanker trucks. The standard covers two hose groups (Group D and Group SD) intended for liquid hydrocarbon fuels (aromatic content ≤ 50% by volume; up to 15% oxygenated compounds) with a maximum working pressure of 1,0 MPa (10 bar). Operating and storage temperature limits, dimensional tolerances, material and electrical continuity requirements are specified to ensure safe, reliable bulk fuel delivery by truck.
Key topics and technical requirements
- Scope & exclusions: Applies to truck bulk fuel hoses; not for LPG, aviation fuel, fuel station or marine systems.
- Hose groups:
- Group D - delivery hose (can be used in limited low-vacuum cases).
- Group SD - suction and delivery hose with embedded helix reinforcement.
- Electrical grades:
- M-grade - electrically bonded with low-resistance bonding wires.
- Ω-grade - electrically conductive via conductive rubber layer.
- Materials & construction:
- Fuel-resistant rubber lining, textile reinforcement layers, outer cover resistant to abrasion and weather.
- Minimum lining thickness 1.5 mm; cover thickness 1.5–2.0 mm depending on bore.
- Mechanical & dimensional limits:
- Nominal bores, outside diameters, concentricity and minimum bend radii defined (see ISO 4671 measurement methods).
- Length tolerance ±1%.
- Pressure and strength tests:
- Proof pressure: 1,5 MPa (15 bar) with no leakage or weakness.
- Minimum burst pressure: 4,0 MPa (40 bar).
- Maximum working pressure: 1,0 MPa (10 bar).
- Physical & durability tests:
- Tensile and elongation requirements for lining and cover compounds (minimum tensile 7 MPa; elongation 250%).
- Resistance to fuels (ISO 1817), ozone (ISO 7326), abrasion (ISO 4649), ageing (ISO 188).
- Adhesion between components, flammability test (no continuing burn), flexibility at ambient and −30 °C.
- Electrical resistance limits:
- Maximum electrical resistance: 10 Ω per length for M- and Ω-grades (assembly limits also specified).
- Marking and testing frequency: Requirements for product identification and type/routine testing are included.
Applications and users
ISO 2929:2021 is used by:
- Hose and hose-assembly manufacturers (design, production and quality control)
- Tanker truck fleet operators and maintenance teams
- Testing and certification laboratories performing hydrostatic, electrical and material tests
- Safety and procurement engineers specifying compliant hoses for bulk fuel transport
- Regulators and inspection bodies verifying equipment safety
Keywords: ISO 2929:2021, rubber hoses, hose assemblies, bulk fuel delivery, tanker truck hoses, hydrocarbon fuels, electrical resistance, proof pressure, burst pressure.
Related standards
Standards referenced in ISO 2929 include ISO 1402 (hydrostatic testing), ISO 8031 (electrical resistance), ISO 8033 (adhesion), ISO 4671 (dimensional measurement), ISO 10619 (flexibility), ISO 1817 (liquid resistance), ISO 7326 (ozone), ISO 4649 (abrasion) and ISO 188 (ageing). These are commonly used alongside ISO 2929 when specifying and testing fuel delivery hoses.