A fuel transfer hose safely conveys petroleum fuels, biofuel blends or fuel additives between tank, pump, dispenser or vehicle. Correct specification starts with the exact fuel chemistry: NBR liners handle petroleum diesel and standard petrol, but B20+ biodiesel, high-ethanol blends and hot aromatic media call for FKM or PTFE liners, and electrical continuity (resistance below 10⁶ Ω) is mandatory wherever flammable fuel flows.
This guide is the buyer's reference for construction, materials, standards (EN 12115, EN 1360, EN 13765, EN ISO 1825, ISO 7840), selection and lifetime cost. For the specification-pitfalls angle, see the sibling article Fuel Transfer Hose: What Every Buyer Needs to Know Before Specifying.
What Counts as a Fuel Transfer Hose?
The family spans low-pressure filler and vent hose, forecourt dispensing hose (EN 1360), industrial fuel delivery and tanker hose (EN 12115 rubber, EN 13765 composite), marine fuel hose (ISO 7840 fire-resistant / ISO 8469), and aviation fuelling hose (EN ISO 1825 / API 1529). What unites them: the liner must resist permeation and swelling from the inside, the cover must resist ozone, UV and spilled fuel from the outside, and the whole assembly must control static electricity.
One family deliberately not covered here: high-pressure injection lines on modern engines are rigid steel tubing engineered by the engine OEM, not flexible hose, do not attempt to substitute hose products in common-rail circuits.
Construction and Liner Materials
- NBR (nitrile): the workhorse for petroleum fuels and oils, petrol, diesel, kerosene, lubricants. Not suitable for hot aromatic media, and standard grades are qualified only up to low FAME blends (typically B7 per EN 590). Typical service range about −30…+100 °C, grade-dependent.
- FKM (fluoroelastomer): aggressive fuel chemistry, high-aromatic fuels, B20–B100 biodiesel, elevated temperatures. Not for ketones.
- PTFE: near-zero permeation and near-universal chemistry (−70…+260 °C); used where purity, temperature or chemical variability defeats elastomers. Antistatic/conductive PTFE versions exist for flammable media.
- Polyamide (PA11/PA12) and barrier thermoplastics: low-permeation liners in multi-layer constructions for evaporative-emission-limited applications.
- EPDM: never for fuels or oils, but it is the correct liner for DEF/AdBlue (aqueous urea per ISO 22241), which attacks NBR-for-fuel logic in reverse.
Reinforcement is textile braid or plies for delivery pressures, with a steel helix added for suction duty (tanker collection) and electrical continuity. Covers are CR or NBR/PVC blends resistant to fuel splash and ozone; fire-resistant marine covers per ISO 7840.
Ratings and Standards Map
| Category | Typical bore | Working pressure | Governing standard |
|---|---|---|---|
| Forecourt dispensing | 16–25 mm | up to 16 bar (type-dependent) | EN 1360 |
| Industrial fuel delivery / tanker (rubber) | 25–100 mm | 10–16 bar | EN 12115 |
| Composite tanker/terminal hose | 25–250 mm | 7–14 bar | EN 13765 |
| Marine engine fuel lines | 5–63 mm | class-dependent | ISO 7840 (fire-resistant) / ISO 8469 |
| Aviation ground fuelling | 25–100 mm | up to 20 bar (type-dependent) | EN ISO 1825 / API 1529 |
Two rules apply across the table. Working pressure falls as bore rises, never quote one figure for a family; read the size-specific datasheet. And elastomer ratings are quoted at 20 °C, so hot fuel or hot environments require the manufacturer's derating data. Braided rubber fuel hose is designed to a 4:1 burst-to-working-pressure factor with a proof test at about 1.5× working pressure; aviation and marine standards add their own type-approval regimes, verify the certificate, not the catalogue line.
Key takeaway: the single most common fuel-hose specification error is chemistry, not pressure, an NBR hose that is perfectly rated for 16 bar diesel will swell and fail in B30 biodiesel or high-aromatic solvent-contaminated fuel.
Static Electricity and ATEX
Flowing fuel generates charge. Fuel transfer hose must therefore provide a defined electrical path: standards such as EN 12115 and EN 13765 specify resistance classes (Ω = electrically bonded assembly, M = conductive/dissipative wall), with assembly resistance verified per ISO 8031, typically below 10⁶ Ω. In ATEX-classified areas (ATEX 2014/34/EU), the hose's conductivity class must match the zone assessment, and the hose never replaces formal bonding and earthing procedures per EN 60079-32-1, both are required together.
Couplings for Fuel Service
- Camlock (EN 14420-7 / MIL-C-27487) is standard for liquid fuel transfer: A/E/F are adapters (male), B/C/D couplers (female), DC/DP dust caps and plugs. Camlock is for liquids only, never compressed air or gases, and never steam. Note the old DIN 2828 designation is withdrawn.
- Tanker couplings (TW system) and Guillemin (EN 14420-8) are separate, non-interchangeable systems, do not mix component families.
- Dry-disconnect couplings (spill-free, e.g. per NATO STANAG 3756) minimise release on connection/disconnection; breakaway/emergency-release couplings protect the installation when a vehicle drives away with the hose connected. They solve different problems and are frequently combined on loading points.
- Fitting materials: zinc-plated steel for basic diesel duty; stainless 316/316L for biodiesel, DEF, marine and coastal (chloride) environments; aviation fuelling excludes cadmium-plated hardware.
- On rubber tanker hose, bolted safety clamps (EN 14420-3 / DIN 2817) on EN 14420-5 tails are the standard assembly method.
Browse coupling options under industrial fittings.
Selection Checklist
- Exact fuel and blend: diesel B0–B7, B20–B100, E10/E85, Jet A-1, MGO/MFO, DEF. Liner choice follows chemistry, including additive packages (some amine-based biocides attack NBR).
- Pressure including surge: fast-closing nozzles and valves spike above steady-state; the rating must cover the spike at operating temperature.
- Suction duty? Tanker collection needs a helix and a stated vacuum rating.
- Electrical class: Ω/M marking per the governing standard, ISO 8031 test certificate, ATEX documentation for zoned areas.
- Bore and velocity: keep pumped fuel below ~5 m/s (gravity feed ~3 m/s) to limit pressure drop and charge generation; 500 l/min needs roughly a 50 mm bore at 5 m/s.
- Fire resistance: ISO 7840 class for engine spaces and marine duty.
- Couplings and safety devices: Camlock/TW/dry-disconnect/breakaway as the installation demands.
- Documentation: declaration of conformity to the named standard, batch test certificate, electrical resistance results; aviation hose requires certification traceable to EN ISO 1825 / API 1529 qualification.
Search the range directly for fuel hose or start from industrial hoses.
Installation and Operation
Respect the minimum bend radius, route at 1.5× the published MBR where dynamic movement occurs, and support long runs. Never install twisted (follow the lay-line). Pressure-test new assemblies at 1.5× working pressure and record the result. Connect bonding before flow starts, every time; verify continuity through the assembly, not just clamp-to-clamp. And confirm additive and blend compatibility in writing whenever the site changes fuel supplier or grade, the hose sees the change before anyone else does.
Inspection, Failure Modes and Replacement
| Symptom | Likely cause |
|---|---|
| Soft, swollen tube; weeping at fittings | Incompatible fuel chemistry (FAME, aromatics) or over-temperature |
| Cover crazing/cracking | Ozone/UV ageing |
| Brown staining through cover | Helix or braid corrosion from moisture ingress |
| Diameter growth along the length | Permeation from prolonged static soak |
| Sudden blow-off | Assembly error or overpressure event |
Inspect visually at each use, formally at least annually; test electrical continuity at every formal inspection. Follow the manufacturer's service-life guidance, commonly around 6 years for light automotive-type fuel hose and up to 10 years for heavy industrial assemblies, regardless of appearance, and retire immediately any hose with exposed reinforcement, weeping fittings or measurable swell.
Cost and Total Cost of Ownership
The premium for the correct liner is small against failure economics: a cheap NBR hose in a B20 duty may fail within 18 months, while the correctly specified FKM assembly at 2–2.5× the price runs for years, and a fuel release adds environmental clean-up and reporting costs that dwarf both. Asset-tagging assemblies with installation date, inspection history and planned replacement typically trims fuel-hose spend by double-digit percentages while eliminating emergency purchases.
Specify with Confidence
Tubes International supplies fuel transfer hose to EN 12115, EN 1360 and EN 13765 with matched Camlock, TW, dry-disconnect and breakaway couplings, electrical continuity certificates and pressure-tested assemblies. Browse industrial hoses and the PDF catalogues, or send your fuel specification, our engineering team selects the hose and fittings and pressure-tests the complete assembly.