Нефтяной композитный шланг

Five Builds, One Fuel Chain

How a Fuel Hose Is Put Together

Two layers decide whether a fuel hose works: the liner that holds the product and the barrier that stops it leaving through the wall.

• Inner helix — galvanized or stainless steel in the bore, holding the shape under vacuum and carrying static to the fittings.
• Liner — polypropylene film on petrol and diesel duty, polyamide or nylon on biofuel, modified nylon or crosslinked polyethylene on light oil.
• Vapour barrier — a polyester or polyethylene film behind the liner. On aromatic blends this is what keeps the product inside the hose over months of static service, and it is the layer buyers never ask about until they smell fuel in the depot.
• Carcass — bonded film and fabric plies carrying hoop stress; ply count rises with bore.
• Cover — abrasion resistant PVC coated fabric, or fibreglass with fire retardant PVC on the fire retardant build, which also gives thermal insulation from outside to inside.

Why the Liner Changes Along the Chain

Petrol, diesel and light oil are hydrocarbon mixtures. A polypropylene liner with a polyethylene vapour barrier holds them, and the barrier is what keeps the aromatic fraction from migrating through the wall. Light oil raises the temperature ceiling to +200 °C, which needs a different polymer in the bore.

Alcohol blends are the exception that catches buyers. B100, bioethanol and methanol attack the liner that handles mineral diesel without complaint: the alcohol absorbs into the polymer, the liner softens, and permeability climbs. That is why biofuel is a separate build with a polyamide or nylon liner rather than an option on the fuel page.

Static, Bonding and Earthing

Static is the failure mode that does not announce itself. On every fuel grade we build the helix bonded to the end fittings so the assembly has a continuous path from the bore to the flange, checked at 1 ohm/m below 100 mm bore and 2 ohm/m at 100 mm and above. A conductive hose is necessary and not sufficient: the assembly still has to be bonded to the tank and to earth before transfer starts, and the bond has to be rechecked after any fitting work.

Pressure Steps and Why They Exist

Both steps follow the same logic: hoop stress rises with diameter at constant pressure, so the pressure class is reduced rather than the wall thickness growing without limit. Size the hose to pump discharge plus surge, then check pressure drop at your flow — a 10 inch line at 225 psi is carrying a lot of product and a long run will cost head.

Приложения

• Road tankers — bottom loading and top loading, unloading at depot gantries
• Rail tankers — crude, diesel, gasoline and ethanol blends
• Bulk terminals — rack service, vapour return, line pigging connections
• Fuel depots and aviation fuelling — Jet A-1 transfer where the liner is confirmed for the additive package
• Biodiesel blending — B100, B20 and ethanol blends at the blend header
• Marine bunkering — the transfer legs that are not ship-to-shore; see the marine category for jetty duty

Installation, Inspection and Service Life

Installation

Bond and earth before the first transfer, not after commissioning. Support horizontal runs every 1.5 to 2 m, respect the bend radius at the bore centreline under pressure, and never twist the hose to meet a flange — a twisted fuel hose ends its life at the fitting. On loading racks, use a swivel or a breakaway coupling so the hose is not the component taking the pull.

Inspection

Check for cover cracking and exposed fabric, a flattened or polished outer helix, loose collars and worn seals, and a bore that has narrowed or softened. Check continuity after any fitting work. Retire the assembly after a kink that does not recover, a cover softened by product, or a failed continuity test — patching a conductive hose invalidates the continuity record.

Service life

Two to three years is typical on terminal duty with daily movement; longer where the hose is static and supported. Cover abrasion and ply fatigue at the fitting are the usual limits, not the liner. A hose that passes product continuously at the top of its pressure class wears faster than one used at half.

Customization, MOQ and Price

• Length — 60 ft standard on bottom loading, up to 80 or 100 ft; 20 m standard on suction and discharge
• Ends — camlock, flange, tank coupling and threaded adapters; TTMA patterns for loading arms
• Marking — cover colour, brand, batch code, fuel type and pressure text, multilingual warning labels
• MOQ — standard sizes from 100 m; custom bore, colour and OEM marking from 500 m per size
• Lead time — 7 to 15 days after order confirmation; assemblies with fixed flanges 10 to 15 days

Price is set by bore, ply count, liner grade and end connection. A light oil build with a nylon liner and a vapour barrier costs more than a standard suction and discharge hose of the same bore, and a fire retardant build costs more again because of the fibreglass cover. Tell us the fuel and the connection and the comparison is made on landed cost, not on list price per metre.

Manufactured in Hengshui on 12 production lines across an 18,000 m² site, supplying 70 countries since 2010, with the film lot, ply count and test pressure recorded on every assembly.

What This Category Does Not Cover

• Acids, alkalis and ketones belong to the chemical composite hose category; a bottom loading liner will not survive them.
• LNG and liquid nitrogen need the cryogenic build, not a chilled fuel grade.
• Above 40 bar specify a wire spiral hose. A composite hose is a transfer product, not a pressure product.
• Saturated steam needs a steam hose; the thermoplastic liner softens.

Products in This Category

• Suction and discharge composite hose, 1 to 10 inch
• Light oil composite hose, 10 bar, to +200 °C
• Biofuel and biodiesel composite hose, 14 bar
• Bottom loading hose, 200 psi, 60 ft
• Fire retardant composite hose, 14 bar

Part of the composite hose range, which covers six families from 25 to 254 mm.

Часто задаваемые вопросы

What is a petroleum composite hose used for?

Moving petrol, diesel, light oil, biodiesel, ethanol blends and their vapours between tank truck, railcar, terminal rack and vessel. It is a transfer hose at 10 to 14 bar, not a pressure hose, and it is supplied as a tested assembly with flanges, camlocks or threaded ends fitted.

Can one hose handle both diesel and biodiesel?

Not reliably. A liner that handles mineral diesel for years can soften in B100 or bioethanol within months, because alcohol absorbs into polypropylene. Specify the biofuel build where the alcohol content is above about 10 %, and keep a separate hose for mineral diesel.

Why does the 10 inch version have a lower pressure rating?

Hoop stress scales with diameter, so a 10 inch bore at 345 psi would need a ply stack and wall thickness no loading rack can handle. The class drops to 225 psi on suction and discharge, and to 150 psi on bottom loading.

How is static controlled?

The helix is bonded to the fittings and continuity is checked end to end before dispatch, at 1 ohm/m below 100 mm bore and 2 ohm/m above. Bond the assembly to the tank and to earth before transfer, and recheck the bond after any fitting work.

What is the temperature range?

-40 to +110 °C on suction and discharge, -40 to +200 °C on light oil, -20 to +100 °C on biofuel, and -30 to +100 °C on bottom loading. The fire retardant build is limited to +80 °C because the fibreglass cover is the temperature ceiling, not the liner.

Can it be used for LPG?

LPG at ambient or chilled to -40 °C runs on the suction and discharge build with a conductive helix. Cryogenic builds are for LNG at about -162 °C and liquid nitrogen at -196 °C, not for cylinder or tanker LPG.

Does a fire retardant cover replace a conductive build?

No, they answer different risks. The fibreglass cover slows fire spread from outside; conductivity drains static from the product. A flammable product line normally needs both, and they are specified together.

What are the order quantity and lead time?

Standard sizes start at 100 m. Custom bore, colour and OEM marking start at 500 m per size, with tiered discounts above that and framework pricing for distributor programmes. Standard builds ship 7 to 15 days after order confirmation.

Tell us the fuel and the connection. Send the product, the alcohol content if it is a blend, the flow rate and the flange pattern through the quotation form and the build, the pressure class and the landed cost come back within one working day.