LL-Fin


Be.Tube Srl offers different finned tubes: tension wound finned tubes, embedded finned tubes and extruded finned tubes.

Tension wound finned tubes are formed by winding a strip made of aluminium or copper around the tube under tension. The strip winding technology provides different types of fins: L-Fin, LL-Fin, KL-Fin.
Embedded fins (G-Fins) are made by winding aluminium or copper strip into a helical groove machined on the outer surface of the tube.

G-fin L-fin
LL-fin KL-fin

Extruded finned tubes are bimetallic tubes whose outer aluminium surface is finned by cold plastic deformation.

Extruded-fin


Fin Material - Extruded-fin Finned Tubes
Fins SB209 - B209 Aluminium Alloy 1050 or 1060 SB75 - B75 Copper
Notes For different materials please contact our technical office


Fin Material - G-fin; L-fin; LL-fin; KL-fin Finned Tubes
Fins EN573-3 Aluminium Alloy 1050 or 1060 SB152 - B152 Copper
Notes For different materials please contact our technical office


Tube Material - G-fin; L-fin; LL-fin; KL-fin; Extruded-fin Finned Tubes
Tube SA179 - A179 Carbon Steel SA213 - A213 Stainless Steel SB75 - B75 Copper SB111 - B111 Copper Alloy
Notes For different materials please contact our technical office


Technical Specifications - G-fin; L-fin; LL-fin; KL-fin; Extruded-fin Finned Tubes
Fin Types Length Tube Diameter Thickness Finned Tube Diameter Fins Density
L-Fin
(m) (ft)
0,3 ÷ 18 1 ÷ 59
(mm) (inch)
15,88 ÷ 50,8 5/8” ÷ 2”
(mm) (BWG)
0,889 ÷ 3,76 20 ÷ 9
(mm) (inch)
38,10 ÷ 76,20 1 ½” ÷ 3”
(fins/m) (fins/inch)
236 ÷ 472 6 ÷ 12
LL-Fin
KL-Fin
G-Fin
Extruded


Technical Specifications - G-fin; L-fin; LL-fin; KL-fin; Extruded-fin Finned Tubes
Fin Types Working Temp.
Resistance
Corrosion Mechanical
L-Fin 135 ÷ 155 °C
↓↓
LL-Fin 155 ÷ 165 °C
KL-Fin 165 ÷ 185 °C
G-Fin 380 ÷ 420 °C
Extruded 280 ÷ 300 °C
↑↑ ↑↑


Inspections and Tests
G-fin; L-fin; LL-fin; KL-fin; Extruded-fin Finned Tubes
Chemical Composition
Mechanical Properties
Hydrostatic Test
Pneumatic Test
Boroscopic Inspection
Eddy Current Test
Tensile Test (only for bimetallic tube)


Applications - G-fin; L-fin; LL-fin; KL-fin; Extruded-fin Finned Tubes

Tension wound finned tubes, embedded finned tubes and extruded finned tubes are main devices for air coolers and the common application fields are:
  • Heat exchangers for power plants (electric, nuclear, thermal and geothermal power plants)
  • Steam condensate systems
  • Chemical and petrochemical industry
  • Food processing plants and refrigeration technology
  • Industrial (steel mills, incinerators, gas compression facilities).


For any kind of information and request do not hesitate to contact our Team, Be.Tube Srl is at Your complete disposal.