ASME SA192 Carbon Steel Finned Tube

High Frequency Welded Fin Tube Product Description:

High-frequency resistance welding usually employs a current of 450,000 Hz. With this technique, the fin is edge wound encircling the tube to give a continuous weld.

The forming of the fin around the tube and the heat of welding causes some upsetting or widening of the base of the fin,resulting in a contact area wider than the fin itself.

Here again, the function of the weld is to maintain the contact between the fin and the tube. Heat is thus transferred across the whole interface and not just through the weld itself. However,the quality of the HF weld is more important in maintaining negligible resistance to heat transfer between the fin and tube.

The use of high-frequency current results in very localized heating of the tube surface and the edge of the fin. This skin effect produces higher weld speeds and greater ease in welding difficult material combinations.

The HF process also allows much thicker fins to be welded.In fact, it is now possible to weld fins heavy enough to replace those previously available only with MIG, TIG and stud-welding processes, which are generally more expensive and require post-weld heat treating.

The HF process involves the use of heat and pressure to obtain coalescence of the fin and tube. An electric current is applied by contacts on the fin and tube, and the resistance in this circuit produces the heat necessary for welding.

 High Frequency Finned Tube Manufacturing Process:

The steel fin (solid or serrated) is helical wound and continuously welded to the tube by high frequency electric resistance welding. This produces a homogeneous, clean and continuous fin-to tube bond with no additional weld material, for a very efficient heat flow and resistance to corrosion.

The welding process enables the combination of any grades for studs and tube: carbon, alloy, stainless steels and high nickel alloys. Alloy steel pipes are stress-relieved after studding, according to the relevant specifications for the class and grade of steel used.

High Frequency Welded Fin Tube(Electric Resistance Welded Pipe) Advantages:

1. The simple and economic installation

The maximum length of high frequency welding spiral finned tube can reach 6 meters, that reduces the join points, making the installation more economic, efficient, and also reduces the leakage probability of joints.

2. Easy maintenance

After installation, high frequency welding spiral fin tube needs no longer to be maintained.

3. High efficiency

The heat dissipation area of high frequency welding spiral fin tube is more than 8 times of the light tube.The internal is smooth, so the internal flow resistance is small.

4. Long service life

Fin and pipes with high mechanical strength, so the tensile strength is more than 200 mpa. Both inside and outside of the tube are all made of hot dip galvanized processing.

High Frequency Welded Fin Tube(Welded Aluminum Pipe) Properties:

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:- Up to Maximum 500 Deg C

High Frequency Welded Fin Tube(Spiral Welded Pipe) Applications：

These Fin Tubes are used in radiators, air preheaters, waste heat recovery systems, boiler fin tubes, and other industries such as power plants, chemical plants, steel plants, and chiller plants.

High Frequency Welded Fin Tube(Spiral Welded Pipes) Specifications：