High Frequency Welded Spiral Fin Tube Suppliers in China
What Is a High Frequency Welded Spiral Fin Tube?
High frequency welded spiral finned tube is to use the skin effect and proximity effect of high frequency current to heat the steel strip and the outer surface of the steel tube until the plastic state or melting, while the steel strip is wound around the steel tube. The welding is completed under a certain pressure when the steel strip is wound. This kind of high-frequency welding is a solid phase welding. It is more advanced in terms of product quality (high welding rate of fins, up to 98%), productivity and automation.
How Are High Frequency Welded Fin Tubes Manufactured?
HFW Finned Tube(High frequency welded solid finned tube) is a spiral winding of steel fins, which is continuously welded on the steel pipe by high frequency resistance welding (HF ERW). A high-frequency current is introduced into the workpiece, the welding contact surface is melted or semi-melted by resistance heat, and then appropriate pressure is applied to the welding contact surface to complete the welding of the finned tube. This produces a uniform, clean and continuous finned tube combined with no additional welding material for very efficient heat flow and corrosion resistance.
1. Base Tube Preparation
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2.Fin Strip Preparation
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3.High Frequency Resistance Welding
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4. Cooling and Straightening
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5. Finishing
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6. Inspection
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HFW Spiral Finned Tube Specifications and Material:
| Parameter | Typical / Available Range | |
| Tube O.D.: | 16 to 273 (mm) | 3/8” to 10”(NPS) |
| Tube Wall Thk.: | 2 to 28.6 (mm) | 0.08” to 1.1” |
| Tube Length: | ≤30,000 (mm) | ≤98.43 ft |
| Fin Thk.: | 0.5 to 3.5 (mm) | 0.02” to 0.14” |
| Fin Height: | 8 to 35 (mm) | 0.31” to 1.3” |
| Fin Pitch: | 3 to 333 FPM | 1 to 8 FPI |
| Fin Type: | Solid, “U”or“V” Serrated | |
| Fin Material: | Carbon Steel (most common grade: 08F, SPCC)
Stainless Steel (most common grade are AISI 304, 316, 409, 410, 321,347 ) |
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| Tube Material: | Carbon Steel (most common grade: A106 Gr.B, A210, A179, A192)
Stainless Steel (most common grade are TP304, 316, 321, 347 ) Alloy Steel (most common grade are T/P5,9,11,22,91 ) Duplex Steel (most common grade are 2205 etc. ) |
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| Welding Method | High-Frequency Resistance Welding | |
| Fin Configuration | Spiral Fin | |
| Customization | Available | |
Carbon steel: boilers, heat recovery, industrial heating
Stainless steel: corrosive environments, chemical processing, demanding temperature conditions
Alloy steel: elevated temperature, high-pressure applications
High Frequency Welded Fin Tube Types
| Solid Fin HFW Tubes | Serrated Fin HFW Tubes | |
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High Frequency Welded Spiral Fin Tube Material
High Frequency Welded Helical Finned Tube By Industy
The High Frequency Welded Spiral Fin Tube have been widely used in heat recovery of boiler economizers, air preheaters and waste heat recovery, as well as heat exchangers and industrial radiators in various fields such as chemical and pressure vessels.High Frequency Welded Solid Fin Tube is also widely used in waste heat recovery of electric power, metallurgy, cement industry and petrochemical industry.
High Frequency Welded Spiral Fin Tube Structure
✅ Base Tube ✅ Fin Strip
✅ Fin Height ✅ Fin Thickness
✅ Fin Pitch ✅ Fin OD
Advantages of HFW Spiral Fin Tubes
1. Due to the fast welding speed and strong self-cooling effect of the weldment, not only the heat affected zone is small, but also oxidation is not easy to occur, so the structure and performance of the weld are very good.
2. Anti-corrosion performance, wear-resistant performance, low contact thermal resistance, high stability, and anti-fouling ability.
3. Large heat exchange area.
Custom HFW Finned Tube Manufacturing
We can customize the material, specification and length according to your requirements.Solve your problems anytime and anywhere. Customize fin tubes and equipment according to your needs. Provide free technical guidance. Welcome to customize with drawings, so that you can purchase without worries.
High Frequency Welded Fin Tubes vs Crimped Fin Tubes
Unlike mechanically crimped or tension-wound finned tubes, HFW finned tubes use high-frequency resistance welding to weld the fins onto the steel tube.
High Frequency Welded Spiral Fin Tube Delivery Condition
Tube ends are square cut, free burrs, internally dried and air blown clean, externally coated with Anti-rust at both ends of high frequency welded spiral fin tube.
Package: Iron frame packing boxes and the desiccants are put into each package for continental transportation as well. or as required
Quality Control for HFW Finned Tube
Each of our High frequency welded Helical finned tube is subjected to stringent quality checks.Inspection and Tests Performed:
1.Chemical Composition inspection: Ensure the materials meet the requirements; a material list can be provided.
2.Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test).
3.Surface and Dimension Test: Ensure specifications meet customization requirements.
4.The quality of the HFW Finned Tube is assured by hydrostatic or pneumatic testing to verify the mechanical bond between the inner tube and the outer fins.
5.Tensile testing: Test the firmness of the welded fins onto the base tube.
Case Study
Discover how Datang Finned Tube customized high-frequency welded finned tubes and high-pressure elbow fittings for a major refinery project in the UAE. Check our strict QC and export packing details.
Last month, Datang hosted a professional procurement team from Kazakhstan. The visit focused on a rigorous inspection of our production lines and quality control protocols for a specialized order of High-Frequency Welded (HFW) Spiral Finned Tubes and matching heat exchanger components.
Discover how Datang supplied premium High-Frequency Welded (HFW) alloy finned tubes for a boiler project in Vietnam, fin-to-tube bonding rate exceeding 99%,boosting heat efficiency by 25%.
Discover how Datang’s custom HFW fin tube heat exchangers solved a -35°C thermal efficiency decay for a Kazakhstan gas plant, significantly reducing fuel consumption.
High Frequency Welded Spiral Fin Tube Application
The spiral fin tube radiator for vegetable and flower greenhouse is an efficient and durable heating equipment, especially suitable for greenhouse cultivation in cold seasons.
During the breeding and brooding process, the high-frequency welded fin tube radiator improves the heat exchange efficiency by increasing the heat dissipation area, and can raise the temperature in the brooding house to the required level in a short time. This design enables the farm to quickly reach and maintain a suitable temperature range (15-20 degrees Celsius) when heating in winter.
The carbon steel finned tube heat exchanger for wood drying is a highly efficient heat dissipation device, which is mainly used to provide a stable heat source during the wood drying process to ensure that the wood is evenly heated during the drying process to avoid deformation and cracking.
The stainless steel finned tube radiator for food drying is an efficient, safe and easy-to-use equipment, especially suitable for the field of food drying.
The working principle of the high-frequency welded finned tube heat exchanger for flue gas waste heat recovery is based on heat conduction and convection heat transfer. High-temperature flue gas passes through the outside of the finned tube, while the working medium (such as water or heat transfer oil) flows inside the tube. The heat of the flue gas is transferred to the working medium through the metal wall of the finned tube, realizing the recovery and utilization of heat energy.
High-frequency welded finned tube heat exchanger for air preheater is an efficient and durable heat exchange equipment, widely used in various industrial fields.
The fin tube radiator for boilers is a device that efficiently utilizes the waste heat discharged by the boiler. Through its specially designed fin tube structure, the heat exchange efficiency is significantly improved. This kind of radiator usually consists of two parts: a base tube and fins. The fins are tightly and evenly wound or welded on the surface of the base tube, thereby greatly increasing the heat dissipation area and allowing heat to be more fully transferred to media such as air or water.
Galvanized finned tube heat exchanger for industrial plants is a highly efficient heat exchange equipment, widely used in various industrial cooling, heating and heat exchange systems. Its core features include efficient heat exchange performance, corrosion resistance and compact structural design, which make it important in industrial production.
Related Product
High Frequency Welded Spiral Fin Tube FAQs
A: High frequency welded spiral production line 8.
A: After you confirm HFW spiral fin tube sample details, the samples will be ready for delivery in 3-7days,and will be sent to you via express and arrive in 3-5days.
A: High frequency welded spiral fin tube can be customized, we can make the new thermoforming or extruding mode based on your drawings and we can sign a confidentiality agreement about your patented product, pls contact us for any further information.
A: Always a pre-production sample,before mass production;always final inspection before shipment.
Inspection & Guarantee Certificate is supplied with shipment, and the Third Party Inspection is available.