Very special inbuilt feature. Bitumen will be solid in form in normal condition. This material has to be semi solid form for it to flow for loading and unloading. The hot bitumen in semi-solid form is loaded. The tanks are fitted with a furnace to heat the bitumen inside the tank enabling it to become semi solid form to flow out for unloading. Insulation is done around the tank to maintain its temperature inside the tank. The insulating material is covered by sheet metals.