Steel-aluminum composite fin tube is currently the most widely used fin tube with air heat transfer, the technology of steel-aluminum composite fin tube is: first, a certain thickness of aluminum tube is tightly sheathed on the base pipe, then the aluminum tube is rolled out by the rolling machine tool to form a spiral fin, thus forming a compact steel-aluminum composite fin tube.

The advantages of the steel-aluminum composite fin tube are: small contact heat resistance, reliable structure, long life, smooth fin surface, and complete isolation of the base tube and heat exchange medium, not easy to scale, easy to clean, long-term maintenance of good heat transfer performance, the base pipe material can be selected carbon steel, stainless steel, titanium, copper, etc., the finned tube is widely used in air-conditioning, air cooling, power plants, petroleum, chemical and other air heat exchange equipment.