A heat exchanger is a device built for efficient heat transfer from one fluid to another, whether the fluids are separated by a solid wall so that they never mix, or the fluids are directly contacted. They are widely used in Steel Plant, Thermal Power, Petroleum Refineries, Chemical Plants, Petrochemical Industries, Oil & Natural Gas Processing. For example STANDARD EQUIPMENTS has specialised in the manufacturer of extended surface heat transfer equipments and its parts for dehumidifying and cooling in the field of heat transmission