There are many types of finned tubes. Although high-frequency welding finned tubes are more advanced .
in terms of product quality and production automation compared with inlay and brazing methods. Due to its factors such as difficulty in welding the root and wrinkles at the root cause many shortcomings in heat exchange efficiency and fouling prevention. By comparison, the Laser welding finned tube is the most advanced product of irreplaceable advantages. It has a high penetration rate, can prevent crevice corrosion, prolong service life and reduce heat transfer resistance. Breaking through material restrictions. And it can use different materials for processing, saving material costs, and easy for secondary processing.
The fin strip is welded continuously and spirally wound onto a polished bare tube. And the tube and fins are bonded together by using advanced laser welding technique.
Dimensions
· Tube outside diameter 8.0–50.0 mm
· Fin outside diameter 17.0 –80.0 mm
· Fin pitch 5 –13 fin/inch
· Fin height 5.0 –17 mm
· Fin thickness 0.4 – 1.0 mm
· Maximum tube lengths 20.0 m
The advantages of Laser welded finned tubes (fin tubes):
Laser welded finned tubes (fin tubes) finning machine has high automatic, the welding of fin to tubes and winding on tubes are made synchronously
100% welding rate,
Laser welded fin tubes has strong soundness between fins and tubes, welding strength is over 600MPa.Laser welded tube finning machine has high precision up to 0.05mm
0 contact resistance, high co-efficiency of heat transfer for spiral fin tubes by laser welding.
Save production cost. Laser welded finned tubes (fin tubes) has more small fin pitch, less than 2.5mm, its heat transfer area increase around 50% comparing to high frequency welded helical (spiral) finned tubes, which make material costs decrease largely as well as volume of heat exchanger.
