Bituminous materials are porous and waterproofing membranes used for construction, roofing, waterproofing and other applications. Bitumen is a viscous liquid soluble in trichloroethylene. They are four methods of manufacture bitumen by atmospheric distillation, vacuum distillation, air blowing and solvent refining. Rheological control is required for the production of bitumen in a given area The air blowing process using Biturox technology grants a maximum flexibility in crude selection. Hence quality bitumen can be produced from a wide range of crudes and refinery feedstock efficiently by downstream process. Here we are designing a VG20 bitumen reactor and heat exchanger for a capacity of 0.75MMTPA