Datang Tube is one of the top five manufacturers and suppliers of wound finned tubes in China. It has a production and processing workshop of 20,000 square meters and can produce more than 50,000 meters of high-quality finned tubes per month.

50000 metres over

Monthly Production Capacity

20000 Square meters

Factory Area

L Type Finned Tube

  • Fin Type: L type finned tube
  • Tube Material: Carbon steel, stainless steel, copper, aluminum
  • Fin Material: Copper, aluminum

Wound sheet type The L type finned tube wound tube is easy to manufacture and cheap, and it is widely used in air coolers for petrochemical industry. However, because the aluminum sheet is fastened to the surface of the steel pipe by the initial stress of winding, when the temperature of the pipe wall is high, the tension of the fin is greatly reduced, the fin starts to loosen, and the contact thermal resistance increases, so its use temperature is relatively low, generally low At 130°C.

KL Type Finned Tube

KL Type Fin Tubes also called knurled finned tubes. This finned tube is basically identical to the Wrap-On fin and produced with a combination of Wrap-On and Embedded. The fins are manufactured from strip which is preformed into an accurately controlled L shape similar to the L type, rolled into a taper which causes it to curl. It is then continuously helically wound under tension onto the tube. The fin wrapped around the tube. The base tube is knurled by a rotating tool, then the foot of the fin is knurled into the knurling of the base tube providing a tight bond with increased thermal performance. Providing the correct fin strip is used the foot of one fin butts up against the next fin and there is no gap between the fins. This gives some corrosion protection to the tube. 

LL Type Finned Tube

LL-Foot Fin Tube– Overlapped L type fin tube is commonly known as double L or overlapped L fin, are used in applications where temperatures do not exceed about 350 degrees Fahrenheit The fins are manufactured from strip in similar to the L type except that the foot is preformed into an accurately controlled stepped double L shape, rolled into a taper which causes it to curl. LL-Foot Fin – Overlapped L is then continuously helically wound under tension onto a tube. The fin hugs the tube with one fin overlapping the foot of the next fin with complete coverage of the base tube. This gives good corrosion protection to the tube. This type of tube is often used as an alternative to the more expensive extruded type fin in corrosive environments.