Integral fin tube is made from one piece of metal. The tube is passed through a rolling head that displaces the wall outward into a helical fin while a mandrel controls the inside diameter. Fin, tube and surface are continuous — there is no bimetallic joint, no contact resistance and no possibility of the fin coming loose.
The wall under the fin thins predictably, and the bore is controlled to the required ID. Integral tubes are available with internal fins as well, for tube-side enhancement in chillers and condensers.
Because there is no dissimilar metal couple, integral fin tubes are a good fit for copper, copper-nickel, stainless and titanium duties, and for compact, robust exchangers that must be cleaned easily.
Applications: chiller and condenser retubes, compressor intercoolers and aftercoolers, marine heat exchangers, air-cooled condensers and compact HVAC coils.
Related: Integral Finned Tube · Laser Welded Fin Production · Extruded Finned Tube Production