LL finned tube

“LL” Finned tube

Double “L” fin is used on applications requiring additional protection to the surface of the base tube. It is produced similar to “L” fin but has a wider fin base which is overlapped during the winding process.
Maximum operating temperature 175ºC.
We can also fin Nominal bore tube from 3/8” to 1 ¼”.

Manufacturing details

Aluminium “LL” finned tube

Max. Fin Height       –  22.22 mm (0.875”)
Min. Fin Height         – 6.35 mm (0.25”)
Max. Fin Density      –  15.8 FPI (622 FPM)
Min. Fin Density       – 8 FPI (315FPM)
Max. Tube Diam.      –  38.1 mm (1.5”)
Min. Tube Diam.       -  9.5 (0.375”)
Max. Tube Length    – 15m (49ft)

Copper “LL” finned tube

Max. Fin Height       –  19.05 mm (0.75”)
Min. Fin Height         – 6.35 mm (0.25”)
Max. Fin Density      –  12.4 FPI (488 FPM)
Min. Fin Density       – 8 FPI (315FPM)
Max. Tube Diam.     –  38.1mm (1.5”)
Min. Tube Diam.       -  12.7 (0.5”)
Max. Tube Length   – 15m (49ft)

Base tube material

Carbon Steel, Stainless steel, Copper, Copper alloys, Titanium.