What is spiral finned tube?

The spiral finned tube is a high efficient heat transfer element with spiral fins. The heat transfer area of spiral finned tubes is several to dozens of times that of smooth tubes, which can enhance heat transfer, reduce flow resistance, and reduce metal consumption, thus improving the economy and operation reliability of heat exchange equipment.

Advantages of Spiral finned tube:

1) Spiral finned tube can increase the heat transfer area and improve the heat transfer effect.

2) Spiral finned tube can reduce the space occupied by the heat transfer, so that the volume is reduced, especially for fast installed boilers.

3) Spiral finned tube can reduce equipment costs, improve equipment safety.

4) The operating cost is reduced due to the lowering of the water side pressure drop.

5) Spiral finned tube can stiffness increases, improve the seismic capacity of the tube and so on.

Manufacturing method of spiral finned tube

Spiral finned tubes can be manufactured by various methods. Finned tubes used in heat exchange equipment such as boilers and pressure vessels mainly have the following manufacturing methods:

High frequency resistance welding spiral finned tube

High frequency resistance welding of spiral finned tube is to introduce high power high-frequency current into the weldment, use the resistance heat generated by the current passing through the contact surface of the weldment joint and the adjacent area to make the welding contact surface reach the molten or semi molten plastic state, and then apply appropriate pressure to the welding contact surface to complete the welding of finned tube.

Brazed spiral finned tube

Brazing spiral finned tubes is to fill a filler metal with a melting point lower than that of the weldment between the weldments, and then heat the brazing temperature. When the weldment is not melted, the filler metal will be wetted and brazed, and the brazed joint will be formed depending on the expansion of the contact part of the weldment, thus completing the welding of spiral finned tubes.

Integral spiral finned tube

Integral spiral finned tube is a kind of integral spiral finned tube, which is formed by extruding and rolling the tube with thick wall tube (blank tube) under the condition of medium frequency continuous heating.

Spiral finned tube

Spiral finned tube usages:

Spiral finned tube has been widely used in boiler economizers, air preheater and waste heat boiler heat recovery and chemical, pressure vessels and other areas of the heat transfer equipment. The capacity of the unit used in the boiler is also small to large, the application is increasing. At present, there are a number of professional manufacturers can produce high-frequency welding, brazing spiral finned tube, and finned tube production equipment and technology from the introduction, digestion, absorption to the development of its own design, manufacturing, quality has reached foreign advanced standards Claim.