Applied Fin Tubes - DuraFin Tube

DuraFin Tube
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DuraFin® Applied Fin Tubes described the creation of an enhanced surface tube by affixing a sheet metal fin to a smooth tube. The fin is helically wound around the tube forming a strong mechanical contact between the tube and fin. Several types of fin attachments provide excellent service life in a variety of applications. In heavy-duty applications, the fins can be permanently bonded to the tube by using solder or braze.
In a nutshell, an applied fin tube (also known as a Tube-Fin Heat Exchanger) is literally what the name suggests - a tube where the fin is applied as a separate material. This creates an annular fin helically wound around the tube that enables an enhanced surface to optimize cooling efficiency.
Applied fin tubes can come in many variations and multiple styles - even under the same tube manufacturer. Knowing which type of fin tube to use and what materials it should include can be critical to the success of the product. Use this blog as a guide.
An individually finned tube exchanger is characterized by helical serrated, slotted, or wavy fins in circular profiles. Fins are attached to the tubes by a tight mechanical bond through tension winding, soldering, brazing, or welding.
One perk to applied fin tubes is you can join 2 dissimilar materials in order to utilize the advantages of both. Similar metals are also common - say a copper tube with a copper fin. It depends on the application. Each material has its own advantages and considerations, depending on end use and effect on performance and efficiency.
For example, an aluminum fin can be applied to a stainless steel tube to maximize air cooling - a very common approach in the cooling industry.
Copper fin delivers superior heat transfer optimization - but can be susceptible to certain corrosion. On the other hand, stainless steel fin has a much lower heat transfer co-efficient but is highly resistant to corrosion and has superior tensile strength properties.