Helical Finned Tube Continuously Welded Spiral Fin Tube For Heat Exchanger
Helical Finned Tube Continuously Welded Spiral Fin Tube For Heat Exchanger
Material
Helical finned tubes are specialized heat transfer elements composed of a base tube and continuous spiral fins welded helically along the tube’s outer surface. They are typically made from carbon steel, stainless steel, or alloy steel depending on the thermal and corrosion requirements. The fins are mechanically bonded or continuously welded to the base tube to ensure excellent heat conductivity and durability.
Specifications
-
Base Tube Material: Carbon steel, stainless steel, or alloy steel
-
Fin Material: Carbon steel, stainless steel, or aluminum
-
Outer Diameter: 19mm – 63.5mm
-
Fin Height: 6mm – 25mm
-
Fin Thickness: 0.8mm – 3.0mm
-
Fin Pitch: 2.5mm – 10mm
-
Tube Length: Up to 12 meters (customizable)
-
Welding Method: High-frequency resistance welding or continuous welding
Main Features
-
High mechanical strength and superior heat transfer efficiency
-
Excellent bonding between fin and base tube ensuring low contact resistance
-
Resistant to corrosion, oxidation, and thermal stress at high temperatures
-
Customizable fin pitch, height, and materials to suit specific heat exchanger applications
-
Long service life and reduced maintenance costs
Our Advantages
From a professional manufacturer’s perspective, we address the key technical concerns of industrial clients:
-
Straightness & Tolerance Control: Tubes are manufactured under strict straightness control (≤1mm/m) and diameter tolerance within ±0.3mm, ensuring perfect fit and easy assembly in heat exchanger systems.
-
Uniform Welding Quality: Continuous automatic welding guarantees consistent fin attachment and uniform heat transfer performance along the entire tube length.
-
Material Traceability & Quality Assurance: Every batch of material is traceable and complies with ASTM, EN, or GB standards. All welds are 100% visually and dimensionally inspected.
-
Thermal Performance Optimization: Precise control of fin geometry ensures optimal surface area ratio, maximizing heat exchange efficiency and reducing thermal resistance.
-
Customization & OEM Service: Tailored designs and alloy combinations to meet customers’ pressure, temperature, and corrosion resistance requirements.
Chemical Composition
| Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) |
|---|---|---|---|---|---|---|---|---|
| ASTM A179 | 0.06 | 0.19 | 0.40 | 0.025 | 0.015 | - | - | - |
| ASTM A213 TP304 | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–10.5 | - |
| ASTM A213 TP316 | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| DIN 17175 15Mo3 | 0.12–0.20 | 0.35 | 0.40–0.80 | 0.025 | 0.020 | - | - | 0.25–0.35 |
| EN 10216-2 13CrMo4-5 | 0.08–0.15 | 0.17–0.37 | 0.40–0.70 | 0.025 | 0.020 | 4.0–6.0 | 0.30–0.80 | 0.45–0.65 |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| ASTM A179 | 325 | 180 | 35 | 72 |
| ASTM A213 TP304 | 520 | 205 | 40 | 80 |
| ASTM A213 TP316 | 515 | 205 | 40 | 80 |
| DIN 17175 15Mo3 | 440 | 235 | 25 | 143 |
| EN 10216-2 13CrMo4-5 | 440–590 | 230–310 | 22 | 160 |
Standards
-
ASTM: A179, A192, A213, A210
-
EN: EN 10216-2, EN 10217-7
-
GB: GB/T 20420, GB/T 5310
-
JIS: JIS G3461, JIS G3462
-
GOST: GOST 550-75
Application Fields
Helical finned tubes are widely used in industries requiring high-efficiency heat exchange under demanding thermal conditions.
Main Industries:
-
Power generation
-
Petrochemical
-
Oil and gas refining
-
HVAC systems
-
Marine and offshore engineering
Specific Applications:
-
Economizers in boilers
-
Air preheaters and waste heat recovery units
-
Condensers and evaporators in heat exchangers
-
Gas coolers and heaters in refineries
-
Air-cooled heat exchangers for process industries
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.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.