Cold Winding Stainless Steel Finned Tube Coil

Why HVAC coils use copper tubes and aluminum fins?

Copper is great for heat transfer, and aluminum – while still very effective -is simply not as good. The first goal of any HVAC coil is to cool or heat. Heat transfer is always the first consideration. Cost is the second. Copper works well for the tubes, but would be prohibitive for the fins. You would need a compelling reason for the fins to be copper, and sometimes there are reasons to do just that. However, the vast majority of HVAC coils that you see are built with copper tubes and aluminum fins. That combination offers the most effective heat transfer at the most efficient cost. To begin, fins are responsible for a surprising 65% – 70% of the heat transfer on any coil, while tubes are responsible for the remaining 30% – 35%. Additionally, in order for your coil to work at optimum performance, you need to have a terrific fin/tube bond. Fins are known as secondary surface, while tubes are referred to as primary surface. While this may seem counterintuitive, the secondary surface is responsible for twice the amount of heat transfer as the primary surface.

The tubes are expanded into the fins, and for that reason, the fins become secondary. As mentioned above, the fins are responsible for 65% – 70% of all heat transfer that takes place in the HVAC coil.  When you think about it logically, it really makes sense. At 8 fins/inch or 10 fins/inch, and with fins that run the height and depth of the coil, there is much more fin surface than tube surface. However, it also points out how good the fin/tube bond must be in the expansion process. Without that bond, the fins cannot perform their job.

Understanding the role and importance of the materials used in HVAC coils cannot be overstated. There is a distinct reason why the vast majority of coils are constructed using these materials. While coils can be built with other tube materials, such as steel, 304/316 stainless steel, 90/10 cupro-nickel, as well as various different fin materials, none of these are as efficient or economical as copper/aluminum.  

Fin Tube Coil Manufacturing Process:

We can produce helical coils ranging from micro Fin Tube to large diameters according to customer’s requirement, including bare tubing, cone shaped and double wrap coil.We can handle any tube bending project.The finned tubing can be twisted and bent into numerous shapes. By forming a tube length into a U-shape, circle, square, or serpentine configuration, limited space is utilized rather than being wasted.

Finned Tube Coil Advantages:

• Advanced and reliable thermal selection capabilities

• Long life cycle / durability

• Corrosion resistance

• Energy saving

Fin Tube Coils(Coiled Steel Pipe) Properties:

Easy installation

High functionality

Corrosion resistance

Longer life/Durable

less clogging

low maintenance

Available with different material for different application.

Finned Tube Coils(Stainless Steel Coiled Pipe) Applications：

Steam air heater / steam radiator

Boiler economizers;

Coolers and heaters

Thermal fluid air heater / thermal fluid radiator

Hot water air heater / hot water radiator

Air heater for fluid bed dryers

Air heater for spray dryers

Air heater for flash dryers

Air heater for dryers  

Fin Tube Coil Specifications：