Product Description

Longitudinal Finned Tube Overview

Longitudinal Finned Tubes are expertly crafted using resistance welding techniques to attach fins along the length of the tube. Initially, the fin strip is shaped into a U-channel, forming two fins from each side of the U. These channels are precision-cut to the correct length, positioned along the tube, and resistance welded in place. They are welded in pairs, directly opposite each other, so the number of fins is always a multiple of four.

Advantages of Longitudinal Finned Tubes:

1. Enhanced Durability: Offers a longer lifespan compared to standard helical fin tubes.
2. Safety and Energy Efficiency: Provides a safer and more energy-efficient heat transfer solution.
3. Improved Heat Transfer: Ideal for increasing heat transfer rates in viscous liquids.
4. Perforated Options: Includes perforated fin designs for efficient drainage when handling liquids.
5. Versatile Applications: Extensively used in horizontal heat exchangers.

Product Parameters for Longitudinal Finned Tubes:

• Base Tube Sizes:
  Ranges from 16 mm to 273 mm (10”), with custom sizes available upon request.

• Tube/Pipe Material Options:

  • Carbon Steel (A106, A333, A179, A210, P5, P11, P22, P9, etc.)
  • Stainless Steel (Grades 304, 316, 321, Duplex, Super Duplex, etc.)
  • Copper and Copper Alloys (Brass, Aluminum Brass, Copper Nickel 70/30 and 90/10)
  • Nickel Alloys (400, 600, and 800 series)
  • Compliance with all major standards such as ASTM, ASME, EN, BS, DIN, etc.

• Fin Material Choices:

  • Includes Carbon Steel, 11Cr Steel, Stainless Steel, Copper Alloys like Brass and Copper Nickel, and Nickel Alloys (400, 600, and 800 series).

• Fin Height Range:
  From 4.0 mm to 38.1 mm.

Product Specifications:

• Tube Outer Diameter (OD):
  16-273 mm (3/8”10” NPS)

• Tube Wall Thickness:
  2.11-25.4 mm (0.08”1”)

• Tube Length:
  Up to 12,000 mm (39 ft)

• Fin Thickness:
  1.0-1.5 mm (0.04”0.06”)

• Fin Height:
  525 mm (0.2”0.98”)

• Fin Pitch:
  1U~36U

• Fin Type:
  Options of “U” or “I/L” configurations

Material Combinations:

• Fin Material:

  • Carbon Steel (common grade: Q235B)
  • Stainless Steel (grades like AISI 304, 316, 409, 410, 321, 347)
  • Alloy Steel

• Tube Material:

  • Carbon Steel (common grade: A106 Gr.B)
  • Stainless Steel (grades like TP304, 316, 321, 347)
  • Alloy Steel (grades like T/P5, 9, 11, 22, 91)

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