About Bimetal Finned Tubes

September 21, 2022

The bimetal Finned Tube is made of metal tubes of two different materials by composite rolling, (such as steel tubes and copper tubes) and aluminum tubes are cold-rolled and formed on a special machine tool, overcoming the disadvantage that aluminum and other metals cannot be welded. It is also called steel aluminum composite finned tube, copper aluminum composite finned tube, and rolled tube. It uses the pressure resistance of the base tube and the High Efficiency heat transfer of aluminum; Plasticity, highlighting the technological characteristics of the two materials. It has incomparable advantages over other types of Finned Tubes.

(1) Light weight. The specific gravity of aluminum is the smallest among common non-ferrous metals and ferrous metals. The fin material of light metal determines that the Heat Exchanger made of aluminum is light in weight.

Laser Welding Fin Tube

(2) High heat transfer performance. The thermal conductivity of aluminum is about 211.9W/m? K. Compared with silver copper, it has lower cost and higher cost performance. Objects with good thermal conductivity tend to absorb heat quickly and dissipate heat quickly.

(3) The air resistance is small. The surface of bimetallic Fin Tube is smooth without wrinkles after processing. Air can be easily penetrated from within the fin spacing.

(4) Low contact thermal resistance. Practice has proved that the contact thermal resistance of bimetal finned tubes is almost zero in the working environment below 210 degrees. Low contact thermal resistance is efficient

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