Base tube material:
Stainless steel, Carbon steel, Alloy, Titanium, Nickel, Copper etc.
Fin material:
Aluminum strip, Copper strip
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 ).
Extruded finned tubes provide the greatest resistance to atmospheric corrosion. The aluminum fin material completely encloses the tube, except at the ends where a tube coating can be applied. Where atmospheric corrosion is present and when operated within design temperature limits, extruded finned tubes provide the most stable performance over time as compared to the other fin types. The fin is rolled from an outer aluminum tube by a process using pressure to create a rolled "pressure bond" between the liner tube and fins. Extruded finned tubes are commonly used in applications with temperatures up to 550 degrees Fahrenheit.
Advantages of Extruded Finned Tubes:
100% fin-to-tube bond providing exceptional efficiency and longevity.
Excellent corrosion protection on the base tube.
Easy to clean with a high-pressure water jet without deforming the fins.
As the outer sleeve is continuous No galvanic corrosion between the tube and fins.
The bonding of the outer and inner tubes removes the risk of loss of contact with the aluminium due to thermal stress and fins are vibration resistant.
Higher heat transfer performance for the life of the unit.
Extruded Finned tubes are commonly used in applications with temperature up to 325 °c.
the aluminum completely encloses the tube material
No gap between fins
No possibility of contaminant accumulation underneath the fins
No possibility of corrosion in between fins and tubes
