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12.75" 7FPI High Frequency Extruded Welded Finned Tubes For Air Cooler

Spezilla is really a professional supplier, they always give us technical advice and provide good quality tubes with very competitive price!

—— Thomas Hoover - United States

Good quality, fast delivery, Spezilla has been supplying heat exchanger tubes for our projects since 2008, we really appreciate your support!

—— Massimiliano Rossi - Italy

Spezilla supports our group very well, and now we are approved supplier of goverment, they are reliable and flexible! Spezilla always answers!

—— Jaime Arias - Argentina

Very competitive price and the tubes are well polished, we are very satisfied with Spezilla from our cooperation since year 2010.

—— Nathalie Gulli - Mexico

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12.75" 7FPI High Frequency Extruded Welded Finned Tubes For Air Cooler

China 12.75" 7FPI High Frequency Extruded Welded Finned Tubes For Air Cooler supplier

Large Image :  12.75" 7FPI High Frequency Extruded Welded Finned Tubes For Air Cooler

Product Details:

Place of Origin: CHINA
Brand Name: SPEZILLA
Certification: ISO9001
Model Number: HF WELDED

Payment & Shipping Terms:

Minimum Order Quantity: Negotiation
Price: Negotiation
Packaging Details: WOODEN BOXED
Delivery Time: 30DAYS
Payment Terms: L/C, T/T
Supply Ability: 100TONS/MONTH
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Detailed Product Description
Tube Materials: CARBON STEEL, STAINLESS STEEL Fin Pitch: 1-7 FPI
Size Range: 1'' - 12'' Welding: HF GMAW
Fin Thickness: 0.035'' - 0.105'' TESTING: EDDY CURRENT
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7FPI Welded Finned Tubes


12.75" Welded Finned Tubes


12.75" extruded finned tubes

1-7 FPI High Frequency Welded Finned Tubes OD 1'' -12.75'' for Air Cooler



SPEZILLA supplies the highest quality welded finned tubing to any part of the world for use in oil refineries, petrochemical plants, power generating stations, fertilizer and gas production plants. The newly designed manufacturing facility, with our high frequency resistance welding machines, enables us to perform large scale projects in reduced times.

The steel fin (solid or serrated) is helically 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 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 various processing industry.



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.


Welded Helical Solid Finned Tubes are manufactured with by helically wrapping fin strip on edge around the tube circumference and continuously welding the fin strip to the tube. The fin strip is held under tension and confined laterally as it is formed around the tube, thereby ensuring that the strip is in forceful contact with the tube surface. A continuous weld is applied at the point where the fin strip first begins to bend around the tube diameter using Vulcan’s unique gas metal arc welding (GMAW) process. This weld process creates the strongest fin to tube attachment in the industry, excellent heat transfer characteristics, low fin-side pressure drop and little to no change in grain microstructure and physical characteristics even when 3%-9% chromium tubes are used.


Aluminum finned tubes for air cooler and heat exchanger

Length: 130mm~18m


Energy conservation,


Aluminum finned tubes for air cooler and heat exchanger


1. The parameters and performance are as follows: 1: Technical parameters: The high degree of fin 0-16mm (or outside diameter of fin φ 25mm-φ 82.5mm); Pitch of fins 2.0-5.0mm; Length of finning tube 0.5~ 14m.

2. Single metal rolling finning tube: Pure aluminum 1060 or aluminum alloy 6063, the 6061 material of outside diameter less than 40 mm

3. Double metal rolling finning tube: Tube-based protection from the outer layer of aluminum tubes, corrosion-resistant; Tube-based can be made from carbon steel pipe, in addition to, stainless steel tube and copper tube can also be used, as well as titanium alloy tube.


Package: The aluminum finned tubes are well packed in plastic film in the inner and steel frame in the outer!


Tube O.D: 3/4" to 10"
Tube Thickness: upon request
Tube Length: upon request
Tube material: Carbon steel / Alloy steel / Stainless steel / nickel / high nickel alloy / nickel copper / nickel - chrome - iron / copper alloy /etc.
FIN Height: 6mm to 38mm
FIN Thickness: 0.8mm to 3mm
FIN Pitch: 3mm to 25mm or 1 to 7 fins/inch
FIN Type: Plain/solid or serrated
FIN Material: Carbon steel / stainless steel / high nickel alloy / etc.


Weld Process GMAW
Tube/Pipe Size 1.00″ to 12.75″ outside diameter
Fin Height 0.375″ to 1.25″
Fin Thickness 20ga (.035″) to 12ga (.105″)
Fin Pitch 1 to 7 fins per inch
Materials Any material combination that can be arc welded
Tube Length No practical limit


12.75" 7FPI High Frequency Extruded Welded Finned Tubes For Air Cooler 

Contact Details
Spezilla Tube Co., Ltd.

Contact Person: Will Ma

Tel: +8613918539222

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