1) Steel Aluminum Composite Finned Tube:   The processing technology of cold-rolled aluminum steel finned tube is that aluminum tube and steel pipe are first processed into bimetal composite pipe, and then the fin is formed after mechanical cold rolling. Based on the physical characteristics of aluminum tube, the finned tube with steel tube as the core and aluminum fin formed by cold rolling are made into one. It is widely used in steel, petroleum, chemical industry, machinery, shipbuilding, power station, hospital and food industry.

1. High heat transfer performance and low contact thermal resistance;

2. The contact area between the fin and the tube is large, and the joint is tight and reliable;

3. Good corrosion resistance and stable long-term service performance;

4. The fin has good rigidity and is not easy to deform.

2) Copper-Aluminum Composite Finned Tube:    Copper aluminum composite finned tube is made of copper and aluminum composite tube after being compounded and then rolled. It has the characteristics of close combination，small thermal resistance, good heat transfer performancehigh strength, small flow loss, strong corrosion resistance, low deformation and long working life under long-term cold and thermal conditions. The integral rolling fin is smooth without burr, wrinkle and easy to clean. When wet cooling is carried out in heating and air conditioning engineering, condensation water on the surface of fin is easy to be removed, and it is not easy to form dust and scale in coax heating and other heat exchange occasions.

3) Pure Copper Composite Finned Tube:      Copper finned tube is a kind of heat exchange element In order to improve the heat exchange

efficiency, fins are usually added on the surface of the heat exchange tube to increase the external surface area (or internal surface area) of the heat exchange tube, so as to achieve the purpose of improving the heat exchange efficiency. The integral rolling finned tube has no contact thermal resistance aood heat transfer performance high strength, heat resistance and mechanical vibration,and good thermal expansion performance.

4) Pure Aluminum Composite Finned Tube:   Single metal composite finned tube is rolled by aluminum tube as a whole. Pure aluminum rolling finned tube has no contact thermal resistance, high strength, heat resistance and mechanical vibration, good thermal expansion performance and considerable expansion heat exchange surface.