High-frequency welded finned tube

2022-09-25Leave a message

High-Frequency Welded Finned Tubes

High-frequency welded (HFW) finned tubes are advanced heat transfer components manufactured using high-frequency currents skin and proximity effects. This process simultaneously heats a steel strip and base tube surface to a plastic/melted state while winding under pressure, creating a solid-phase weld that integrates fin and tube into a unified structure.

HFW Finned Tubes Advantages

  • 95%+ welding rate - Superior metallurgical bond quality
  • 8x heat dissipation vs. bare tubes
  • 200MPa+ tensile strength at fin-tube joint
  • 1.10~1.20w/kg·℃ metal thermal strength
  • 6m maximum lengths reduce connection points
  • Minimal maintenance requirements

HFW Finned Tubes Technical Specifications

Construction & Materials

  • Base Tubes: Stainless steel, ND steel (corrosive environments), Carbon steel (non-condensing)
  • Fin Materials: Carbon steel, Corrosion-resistant steel, Stainless steel, Alloy steel
  • Fin Thickness: ≥0.8mm
  • Fin Height: Typically < base tube radius
  • Surface Treatment: Internal/external hot-dip galvanization

Design Variants

  • Solid Fin Tubes: Standard continuous fin design
  • Serrated Fin Tubes: Enhanced heat transfer for high-fin applications

Performance Characteristics

  • Operates in high-temperature/pressure environments
  • Smooth internal bore minimizes flow resistance
  • Wide operational temperature range
  • Superior wear resistance

HFW Finned Tubes Industrial Applications

  • Power Generation: Boiler economizers, air preheaters
  • Petrochemical: Process heaters, reformers
  • Metallurgy: Furnace heat recovery systems
  • Water Treatment: Thermal fluid systems
  • HVAC: Industrial heat exchangers

HFW Finned Tubes Comparative Benefits

Outperforms traditional methods (inlaying, brazing, hot galvanizing) in:

  • Welding integrity and joint strength
  • Production efficiency and automation capability
  • Heat transfer efficiency per unit mass
  • Long-term operational reliability

Manufacturing Process

Proprietary high-frequency welding technology bonds 0.8-1mm steel strips to base tubes through simultaneous heating and pressure application during winding. This national-patented process ensures complete fusion while maintaining dimensional precision.

High-frequency welded finned tube
 

High-frequency welded finned tube