The company born in 1931 like Angelo Longoni as maker of finned tubes and heat exchanger with finned tubes extending in years to Longoni Engineering SRL extending the production also tube bundle heat exchanger. Heat exchanger are suitable to cover a wide range of application in industrial service were is needed to cooling, heating, condenser water, oil, gas etc. Materials available for heat exchanger fabbrication may be selected from carbon steel, stainless steel, copper, aluminium alloys, titanium both for tubes and fins; materials are selected in function on use of heat exchanger to have efficiency and durability. By usin many different configuration of geometries, tubes diameter, fins shape, may offer optimize solution for customers. The project is analyzed and ottimize to be have a right application of materials for durability and efficiency. Manufacturing and inspection are in accordance with the most recognized intenational standards.