Spiral Finned Tube Welded Helical Serrated Finned Tubes For Industrial Heat Exchangers

Material

The Spiral Finned Tube, also known as a Welded Helical Serrated Finned Tube, is a type of enhanced heat transfer component made by welding helical fins to the surface of a base tube. The base tube is typically manufactured from carbon steel, stainless steel, or alloy steel, while the fins are usually made from the same or compatible materials. The fins are helically wound and welded onto the tube’s outer surface to increase heat transfer efficiency in air-cooled heat exchangers, boilers, and industrial radiators.

Specifications

• Base Tube Material: Carbon steel, stainless steel, or alloy steel (ASTM A179, A213, A333, etc.)

• Fin Material: Carbon steel, stainless steel, or alloy steel

• Fin Type: Helical serrated fin (continuous or segmented)

• Fin Height: 8–16 mm

• Fin Thickness: 0.8–1.5 mm

• Fin Pitch: 2.5–10 mm

• Tube Outer Diameter: 19–63.5 mm

• Tube Wall Thickness: 2–5 mm

• Fin Attachment: High-frequency resistance welding

• Length: Up to 15 meters (customizable)

Main Features

• High Heat Transfer Efficiency: The serrated fin design creates turbulence in the air stream, improving overall heat transfer performance.

• Strong Fin Bonding: The high-frequency welding process ensures excellent metallurgical bonding between fins and the base tube, ensuring long service life under thermal cycling.

• Corrosion and Oxidation Resistance: Suitable for high-temperature and corrosive gas environments.

• Customizable Design: Fin dimensions, pitch, and materials can be tailored for specific industrial applications.

• Durability: Excellent mechanical strength to withstand vibration, thermal expansion, and contraction cycles.

Our Advantages

From a professional manufacturer’s perspective, we focus on several key aspects that customers care most about:

1. Precision Welding and Straightness Control:
   Our advanced high-frequency welding lines ensure fin-to-tube bonding consistency, with tube straightness controlled within ±1 mm/m and minimal distortion.

2. Dimensional and Tolerance Accuracy:
   Tube outer diameter tolerance is maintained within ±0.5%, and fin pitch accuracy is within ±0.2 mm, ensuring optimal heat exchange uniformity.

3. Extended Service Life:
   We employ ultrasonic and eddy current testing to guarantee weld integrity, significantly extending product service life compared to conventional fin tubes.

4. Material Certification and Traceability:
   Each batch of materials comes with full traceability under ISO 9001 standards, ensuring compliance with ASTM/EN/JIS specifications.

5. Corrosion Protection Options:
   Optional surface treatments such as galvanizing, aluminum coating, or epoxy painting are available for enhanced corrosion resistance.

Chemical Composition (Typical Grades Comparison)

Mechanical Properties

Applicable Standards

• ASTM: A179 / A213 / A333 / A556 / A210

• EN: EN 10216-2 / EN 10217-5

• JIS: JIS G3461 / G3462

• GB: GB/T 13793 / GB/T 5310

• GOST: GOST 8732 / 8734

Application Fields

Spiral Welded Helical Serrated Finned Tubes are widely used in industrial heat exchangers for air cooling, gas heating, and energy recovery systems.

Specific Applications:

• Power Plants: Air preheaters, economizers, and condensers.

• Petrochemical Industry: Process gas coolers, heat recovery units.

• Refineries: Air fin coolers, heat recovery steam generators (HRSG).

• Steel and Metallurgy Plants: Flue gas waste heat recovery.

• HVAC and Refrigeration: Industrial air-cooled condensers and evaporators.

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Who We are ?

-------A professional steel pipes materials inventor, manufacturer and solution provider
Torich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the factories of Seamless Steel Tubes with Carbon and Alloy Steel Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless & Welded Stainless Steel Tubes with Nickel and Alloy Steel Grade.
Our factory was established since 1997, with the name of TORICH INTERNATIONAL LIMITED. The factories’ technicians are of great engineering experience in steel pipe industry for more than 20 years, which are in great command of production technology for Cold Drawing and Cold Rolling. So we have strong technician team and manufacturing capability.

What products we do?

------- Invent and produce various Precision Steel Pipes

Our steel pipes cover the following ranges:
Seamless Precision Steel Pipes

Bearing Steel Tubes
Welded Precision Steel Pipes, with DOM production
Seamless Heat Exchanger Steel Pipe
Seamless Boiler Steel Pipes

Honed Tubes

Hydraulic Cylinder Steel Tubes

Hydraulic Telescopic Cylinder Tubes
Seamless Structural Steel Pipes
Seamless Mechanical Steel Pipes
Seamless Alloy Steel Tubes & Pipes
Seamless Stainless Steel tubes
Welded Stainless Steel Tubes
Seamless Stainless Steel Tubes & Pipes
Welded Stainless Steel Tubes & Pipes
Seamless Carbon Steel Tubes & Pipes
Nickel Alloy Steel Tubes & Pipes

What TORICH do:
1. Producing Steel Tubes
2. Selling both on Domestic and International Market
3. Precisely Targeting Customers’ Requirement- Sourcing the right factory for right products for Customers

Products Application:
Oil Cylinders
Air Cylinder, 
Automotive Cylinder Liners
Boilers, Pressure Vessels
Shell & Heat Exchangers
Jack Lifting
Telescopic Systems
Pneumatic Cylinders
Agricultural Machineries

Size range is: 
O.D. 4-350mm, 
W.T. 0.5-30mm, 
Length: according to customer’s requirement and agreement
 

Steel Grade:
Carbon Steel Grade:
ST35.8, ST37.0, ST44, ST52;
E155, E195, E215, E235, E275, E355;
195GH, P235GH, P265GH, P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2;
SAE1010, SAE1020, SAE1026, SAE1035, SAE1045;

Carbon steel tube: SA178, A179, A192, A210, SA213, SA214, etc.
Alloy Steel Grade:
T2, T5, T9, T11, T12, T17, T21, T22, T91,T92, 15Mo3,16Mo3, 13CrMo44;
SAE4130, SAE4140, 40Cr, 40Cr4, 10CrMo910, 12CrMo910, 11CrMo910,
25CrMo4, 35CrMo, 35CrMo4, 42CrMo4, 34CrMo4, 20MnV, 20MnV6,20CrMn;
Carbon steel tube: A179,A192,A210,DIN17175,etc.

Bearing Steel Grades:
GCr15 52100 suj2 suj3 100Cr6 SKF3S SKF3S 20CrNiMo 8620H 4118H;

Nickel Alloy Grade:
N02200/2201, N04400, N06600, N06601, N06625, N06852, N06219, N06690, N08800/8810/8811, N08825, N08028, N08535, N08904, N08925, N08926, N010276, N06022, etc.

Austenitic/Super Austenitic Stainless Steel Grade:
304/304L, 316/316L, 314, 321, 347H, 316Ti, 316LMod, 317L/N, 310S, 253MA, 330, 904L, S31254, XM-19, etc. 

Ferrite/Martensite Stainless Steel Grade:
TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444, TP439, TP446, etc. 

Duplex/Super Duplex Stainless Steel Grade:
S31803, S32304, S31500, S32550, S32750, S32760, etc. 
Corporate Culture:
We focus on Quality First, Quality Traceability, and Quality Stability!
We focus on Customer First, People First, and Quality-Oriented!
Success:
First factory started in 1997, in the name of Torich , now covers 50000 square meters of factory building, with more than 100employees, and over 45 million RBM assets.
In 2008, we started the company of Torich International Limited for international business and marketing.
Welcome partners from all over the world for long term cooperation!