Bitumen Tank Trailer 1) Isolation cladding 2) Heating pipe Bitumen Tank Trailer:Wespecializing in special vehicle, up to now, five producing lines have been built, including concrete mixer, liquid & powder tank, dump truck (tipper), low flat-bed and common semi-trailer. After the improvement of technology in 2007, we have achieved a production capacity of 20, 000 units per year.