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High Frequency Welded Fin Tube

Posted on 2020/12/03
High Frecuency Finned Tubes
Datang supplies the highest quality High Frecuency Finned Tubes to any part of the world. The newly designed manufacturing facility, with our state-of-the-art high frequency resistance welding machines, enable us to perform large scale projects in reduced times.
The steel fin, that may be solid or serrated, is helically wound and continuously welded to the tube by high frequency electric resistance welding. This produces an homogeneous, clean and continuous fin-totube bond with no additional weld material, for a very efficient heat flow and resistance to corrosion.
There are some applications for which one or the other fin type is preferred. While in some cases fouling and cleaning considerations will favour solid fins, serrated fins are superior with respect to weight, compactness and price.
High Frequency Welded Fin Tube

High Frequency Welded Fin Tube
The use of high-frequency current results in very localised heating of the tube surface and the edge of the fin. This skin effect produces higher weld speeds, hence post-weld heat treatment is not considered necessary because of the superficial nature of the changes in the microstructure.
Tube bending:
Our finning machines are equipped with online single or duplex cold bending equipment that can manipulate both ends of tubes in a single operation, thus ensuring exact alignment of the ends. Our bending machines are capable of bending both bare or finned tubes with diameters from 31 mm to 76 mm.
Corrosion protection:
If required, the external surfaces of finned tubes can be treated with a protective coating. Our engineers are always ready to assist you with design considerations to meet your specific product needs.
Uses of finned tubes
The main uses for high frequency welded finned tubes are in the heat recovery associated with boilers for power generation and in furnace applications for the petrochemical industry.

High Frequency Welded Fin Tube

High Frequency Welded Fin Tube
Sizes and materials
Our high frequency welding finning machines are capable of handling tube diameters from 21 mm o/d to 273 mm o/d and tube lengths of up to 26 meters. Fin sizes range from 6 mm to 38 mm high and from 0.8 mm to 3 mm thick.

High Frequency Welded Fin Tube (Continuously Welded Spiral Fin Tube) :-
As the name suggests , in this type of Fin Tube the finning is a Spirally Wound .
The fins are manufactured by Spirally Winding the fin around the Base Tube and Pipe. During the winding the fin is Coninouslly Welded by High Frequency welding giving the Most reobust bond between the the Fin and the Tube.
This type of Fin Tube is used specifically where the application involves a lot of Mechanical Stresses like continuous vibrations etc.
The welding bond between the Tube and The Fin also ensures that almost perfect heat Transfer Efficiency is achieved. Also it can give the highest operating temperature ranges.
These Fin Tubes find application in RADIATORS , AIR PREHEATERS , WASTE HEAT RECOVERY SYSTEMS, BOILER FIN TUBES etc and are preferred in Industries like Power Plants , Chemical Industries , Steel Plants , Chiller Plants etc,
High Frequency Welded Fin Tube (Continuously Welded Spiral Fin Tube):-
Manufacturing Process :- Continuously Welded Spiral Fin Tube
Fin To Tube Bond :- Excellent
Heat Transfer Efficiency :- Excellent
Mechanical Resistance: – Excellent (Hence can be frequently cleaned with high pressure jets unlike other fin tubes. Thereby reducing down time and increasing overall life)
Corrosion Protection: – Moderate
Temperature Range :- Upto Maximum 500 Deg C

High Frequency Welded Fin Tube

High Frequency Welded Fin Tube
Manufacturing Range (Welded Fin Tube / Solid Fin Tube ):





Base Tube Material

Stainless Steel, Carbon Steel , Alloy Steel, Titanium , Copper, Duplex Stainless Steel, Inconel etc. (all material in the theoretical limit )


Base Tube Outside Diameter

16.00 mm to 225.00 mm ( ½" NB Pipe to 8" NB Pipe)


Base Tube Thickness

2.50 mm And Above


Base Tube Length

500 mm Min To 12000 mm


Fin Material

Carbon Steel , Alloy Steel , Stainless Steel ,


Fin Thickness

0.80 mm To 2.50 mm


Fin Density

79 FPM ( 2 FPI ) to 276 FPM ( 7 FPI )


Fin Height

9.8 mm to 25.00 mm


Bare Ends

As per Client Requirement


Manufacturing Capacity

3,00,000 Metres Per Annum

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