Finned Tubes

Thermoregulation has been a vital part of nature for billions of years starting with the cooling fins of the stegosaurus to the large thin ears in modern elephants.

Modeled after nature, our finned tubes effectively reduce the total number of tubes required in an application. Fins remove heat from the surface of the inner tube through convection. By increasing heat transfer rates, not only is the number of tubes needed reduced but a reduction in equipment size and cost can also occur. Combined, these reductions can make a significant—and profitable—difference to your bottom line. We offer multiple fin styles, all with different specs and operative requirements. Each respective style is sturdy and resistant to mechanical stress. All can be easily cleaned with water or steam.

“G” Fin

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“G” Fin

Fin strip is wound & embedded on a groove and securely locked by closing the groove with the base tube metal. This ensures maximum heat transfer at high temperatures. Max. operating temp. 450ºC

“L” Fin

The strip material is subjected to controlled deformation under tension giving the optimum contact pressure of the foot of the fin onto the base tube thus maximizing the heat transfer properties. The foot of the fin considerably enhances the corrosion protection of the base tube. Max. operating. temp. 150ºC

“KL” Fin

Manufactured exactly as the ‘L’ fin except that the base tube is knurled before application of the fin foot. After application the fin foot is knurled into the corresponding knurling on the base tube thereby enhancing the bond between the fin and tube resulting in improved heat transfer characteristics. Max. operating. temp. 260ºC

“LL” Fin

Manufactured in the same way as the ‘L’ fin type except that the fin foot is overlapped to completely enclose the base tube thereby giving excellent corrosion resistance. This type of tube is often used as an alternative to the more expensive extruded type fin in corrosive environments. Max. operating. temp. 180ºC

“Crimped” Fin

This fin type is a non taper fin wrapped under tension around the base tube. The finning process results in a crimp forming at the foot of the fin. Fin is then welded to the base tube at the strip ends. Max. operating. temp. 250ºC

“Extruded” Fin

This fin type is formed from a bi-metallic tube consisting of an aluminium outer tube and an inner tube of almost any material. The fin is formed by rolling material from the outside of the exterior tube to give an integral fin with excellent heat transfer properties and longevity. Extruded fin offers excellent corrosion protection of the base tube. Max. operating. temp. 280ºC

“Integral Low” Fin

“Integral Low Fin” Fin

Integral Low Fin Tube has the advantage that it can improve the thermal performance of a Heat Exchanger without the necessity for changing shell size, flow arrangement or the repositioning of piping. The external surface of the tube is increased by the formation of “low fins” by direct extrusion from the material of the base tube.

“Welded” Fin

High frequency welded spiral finned tube is one of the most widely used finned tubes. It is a plain type fin, made by helically winding the fin strip on edge around the tube. The fin is continuously welded to the tube by a high frequency electrical resistance welding process which leaves the tube essentially unchanged metallurgically. The width of the weld is always greater than 90 percent of the thickness of the fin, assuring a strong bond between the fin and the tube for efficient heat transfer and long life. Solid fins are preferred in fouling applications. The finished finned tube is extremely strong mechanically and has greater resistance to bursting pressure than the bare tube due to the reinforcing effect of the fin. Because of its excellent strength and resistance to deformation, this tubes are well suited for applications where severe abuse is expected in service.