Studded tubes, double-H fins, T-type fins, elliptical and flat-V fins, knurled and serrated variants — special geometries for dust-laden gas, severe erosion and space-limited retrofits.
Special geometries we produce
- Studded tubes — cylindrical studs welded to the tube for dirty gas and high dust loads; easy to clean, resistant to erosion.
- Double-H finned tubes — H-shaped fins with a wide gas channel, used in boiler economisers and air preheaters where fouling is a concern.
- T-type finned tubes — four fins welded at 90°, a compromise between surface area and cleanability.
- Elliptical finned tubes — lower pressure drop and tighter bundle spacing for retrofit projects.
- Flat-V and rectangular fins — flat surfaces for specific coil and duct arrangements.
- Knurled and serrated fins — improved air-side heat transfer for clean streams.
- Copper and copper-nickel fin tubes — for marine, HVAC and potable-water duties.
Product Gallery
Serrated fins
Serrated (cut) fins are produced by cutting the fin into short segments after winding. The segments break up the boundary layer and typically increase the air-side heat transfer coefficient by 10–20 % for the same surface area, at the cost of slightly higher pressure drop.
Studded tubes
Studs are resistance-welded to the tube in a dense pattern. The open geometry tolerates dust, soot and ash that would bridge a continuous fin, which makes studded tubes a common choice for waste incineration, biomass and cement plant economisers.
Describe your special geometry and we will quote it
Tell us the tube diameter, fin height, fin pitch, materials and quantity — we reply with price and lead time within one working day.