The bitutainer is the 30 ft direct-flame heated bitumen ISO tank, designed and built by Danteco (and a small number of other specialists). UN 3257 (elevated-temperature liquid) is the IMDG hazard classification; bitumen at 140 to 180 deg C is the canonical cargo. The tank uses a double-skin (bunded) construction with super-insulation and a flame tube that runs the length of the tank, fired by a propane or gas burner at one end. The flame heats a heat-transfer fluid that radiates back through the tank wall, keeping the bitumen above its working temperature on multi-week sea voyages. Capacity 28,500 L typical, on a 30 ft 1CCC frame.
What bitutainer is built for
Bitumen and asphalt (UN 3257) shipped at working temperature for road-construction and roofing applications. Sulphur, molten (135 deg C) in dedicated sulphur builds with similar heating systems. The cargoes solidify at ambient temperature and would be impossible to discharge at the destination port without active heating. The direct-flame system gives the highest heating power of any ISO-tank format, suitable for the high-thermal-mass viscous cargoes.
Construction and materials
Carbon-steel Q345R cylinder, 8 mm reference shell, double-skin construction with the inner shell surrounded by an outer bunded skin (the bunding catches any leak from the inner shell). Super-insulation 150 mm typical between the two skins. Flame tube runs longitudinally inside the inner shell, firing from a propane or gas burner mounted at one end of the tank. Internal baffles divide the cargo into compartments to reduce surge during transit and discharge.
The 0.55 bar test pressure is one of the lowest in the ISO-tank fleet because the cargo is non-pressurised and the build is essentially an atmospheric storage tank with a working vapour space. Bottom outlet allowed for discharge through the tank’s heated outlet plumbing; cargo must be at working temperature for outflow.
When bitutainer is the right choice
Bitutainer is the right tank for bitumen and similar high-temperature non-pressure cargoes shipped intermodally. Thermal-oil and electric heating variants are also available from Danteco and other specialists, with the choice driven by available energy supply at loading and discharge ports. Direct-flame is the highest-power and most independent option (operates on bottled gas with no shore power requirement); thermal-oil offers gentler heating with lower fire risk; electric runs cleanest but requires shore power.
When bitutainer is the wrong choice
Bitutainer is the wrong tank for any non-elevated-temperature cargo. The heating system adds tare and operational complexity. Bitutainer is also the wrong tank for liquid pressure-driven cargo (the 0.55 bar MAWP is too low) and for chemistry that the carbon-steel shell cannot tolerate.
How a bitutainer booking is verified
Pre-loading inspection covers the standard plate stack plus the heating-system functional test (verifying the flame tube fires and heats correctly), the burner-fuel charge level, the heat-transfer-fluid level and condition, and the bunded-skin integrity check (visible signs of leakage between inner and outer skins). Operating-temperature monitoring during transit is part of the booking; the operator’s logs document temperature stability throughout the ocean leg.