What is a stainless steel fuel tanker semi trailer?

Short answer, before the detail

It is a tractor-drawn tank trailer whose shell, end plates and internal bulkheads are fabricated from stainless steel rather than carbon steel or aluminium. Because stainless resists corrosion without an internal coating, the tank will not shed rust scale into the product, it can be cleaned between incompatible loads, and it will carry fuels, edible oils and mildly corrosive chemical liquids in the same unit. The trade-off is weight and price against a carbon steel tank — so stainless is specified where cargo purity, product changeovers or corrosion resistance actually matter.

Why specify stainless steel instead of carbon steel or aluminium

Every tanker trailer performs the same job — the material decides what you can put in it

Four 9,000 litre compartments on one trailer

Bulkheaded, not baffled — separate products on a single run

The 36 m³ tank is divided by solid bulkheads into four compartments of 9,000 litres. Bulkheads are solid dividers: they create independent mini-tanks, so this trailer can deliver four different products or four grades at once, and the bulkheads also cut the back-and-forth surge of liquid while the vehicle is moving. Each compartment carries its own stainless steel manhole cover and stainless steel API discharge value.

Product photos

The exact unit offered — stainless steel shell, four compartments, three TONGYA axles

Technical specifications

Confirmed configuration of the unit shown, with the factory's standard fuel tanker data

Design notes from the factory

• Overall length is kept within 12.5 m — the manoeuvrability limit the factory works to for tanker trailers.
• Overall height is held to the factory's tanker standard of about 3.75 m, which keeps the centre of gravity down and stays clear of most height restrictions.
• Standard tanker capacities in this family run from 30 m³ to 60 m³, with 36 m³ sitting in the volume range most multi-product depots order.

Construction and safety equipment

What the four compartments sit inside — and how the load is contained

Tank body

• Stainless shell and end plates welded to a continuous, fine-seam-free surface, so the shell seals against leakage out and against impurities getting in.
• Thickened bottom plate to take the concentrated load of a full 36 m³ of liquid.
• Elliptic section — the oval profile lowers the centre of gravity compared with a box tank and lets the shell drain more completely.
• Bulkheads between compartments act as structural rings as well as dividers, stiffening the shell and limiting liquid surge.

Containment and control

• Stainless steel manhole covers — one per compartment, for top loading, inspection and venting.
• Stainless pneumatic bottom safety valve on each compartment: the valve only opens when the tractor's air supply is engaged, so a compartment cannot dump its load while the trailer is running.
• Stainless steel API 4 inch discharge valve with one discharge line per compartment, so product can be taken off compartment by compartment and metered accurately.
• WABCO RE 6 relay valve with two 45 L air tanks and ABS — the braking package the factory fits to this tanker line.
• Side underrun protection, rear bumper bar and reflective conspicuity marking, as fitted to the unit photographed.
• Rear access ladder and top walkway for safe manhole operation.