There are two types of Shell and Tube Heat Exchangers used in industrial applications :

Vishal Tube Industries is one of the major manufacturers of Stainless Steel Heat Exchanger Tubes in welded and seamless construction for applications in Power generation i.e. Nuclear, Thermal and Solar Power Plants , Refinery and Petrochemical, Oil and Gas, Chemical and Fertilizer, Process Industries , Defence , Atomic energy and Aerospace, Pulp and Paper Industries etc.