JIANGSU HAOHUA INDUSTRY GROUP

Spirally Wound High Frequency Resistance Welded Finned Tubes are used in Heat Recovery Systems associated with Furnaces for Petrochemicals applications, and with Boilers for Power Generation and Waste Heat Recovery applications. The usage of finned tubes in Heat Exchangers reduce cost and size of the equipment which directly results in performance improvement.

Manufacturing Process

The High Frequency Resistance Welding process usually employs 400, 000 Hz current. With this technique, the fin is wound on edge around the tube spiraly and a continuous weld is obtained.

The High Frequency Resistance Welding process produces a strong metallurgical bond between the fin and the tube while minimizing the heat affected zone (HAZ) in the tube.

PROGEN follows International Standards for Dimensions, Tolerances and Tests for High Frequency Resistance Welded Finned Tubes.

Product Specification:

Fin Height: 0.32" – 1.0" (8.0mm – 25.4mm) Fin Height: 0.50" – 1.50" (12.7mm – 38.1mm)

Fin Thk: 0.04" – 0.11" (1.0 – 2.7mm) Fin Thk: 0.04" – 0.11" (1.0mm – 2.7mm)

Fin Spacing: 1 – 6 per inch (39 – 236 per metre) Fin Spacing: 1 – 6 per inch (39 – 236 per metre)

Tube Outer Dia: 1" – 6" (25mm – 152.4mm) Diagram Tube Outer Dia: 1" – 6" (25mm – 152.4mm)

Segment Width: 5/32",5/16" (4.5mm, 8.0mm)

Overall Tube Length: 18 Mtrs

Tube & Fin Material: Carbon Steel, Alloy Steel, Stainless Steel (Any Combination)

Type of Tube: Welded (or) Seamless

Tube Ends: Straight (or) Bent

Details Required for Enquiry:

Bare Tube: OD, Thickness, Length & Specification/Material

Fin: Thickness, Height, Fin Spacing (Pitch), Fin Length & Specification/Material

Fin Type: Plain or Segmented. If Segmented, Segment width and depth

Edge Preparation:

Square Ends, Bevelled Ends, Straight or Bent