Serrated Fin Tube for Heat Exchanger

What is Serrated Fin Tube?

Serrated fin tube heating tube has excellent heat dissipation effect, the raw materials used in the fin tube radiator also ensure the stable operation of the radiator and excellent heating during the later use of the radiator. Among them, steel finned tube radiators and steel-aluminum composite finned tube radiators have been more and more selected by more people in recent years, and have become the necessary heat dissipation equipment in large areas.

Workshop with steel fin tube radiator, this series of radiator has the advantages of small thermal resistance coefficient, high metal strength and excellent anti-corrosion performance, excellent heat transfer rate, compared with other traditional radiator, in the humidity and cleanliness of the more harsh environment, fin tube radiator is more suitable for the heat dissipation device.

Serrated Fin Tubes are produced in the same manner as solid fin, except that before the fin strip is formed around the tube, the fin strip is cut (or “serrated”) crosswise from one edge (which will become the outer edge of the fin segments) to within 1/4″ of the other edge, leaving an uncut portion that will become a continuous base for the fin segments. The interval between cuts (which determines the segment width after the strip is formed around the tube) may be specified as either 5/32″ or 5/16″.

After being cut, the fin strip is held under tension and confined laterally as it is formed around the tube, thereby ensuring forceful contact with the tube surface.

As the fin strip is formed around the tube its outer (serrated) edge spreads, opening the segments like petals of a daisy. A continuous weld is applied at the point where the fin strip first begins to bend around the tube diameter using Datang’s unique gas metal arc welding (GMAW) process.

This welding process creates the strongest fin to tube attachment in the industry, excellent heat transfer characteristics, low fin-side pressure drop and little to no change in grain microstructure and physical characteristics even when 3%-9% chromium tubes are used.

For a given pipe or tube size, the desired heat transfer surface area per unit length of tube can be obtained by specifying the appropriate fin height and/or number of fins per inch of length. See Design Information for extensive tables of surface areas and fin weights.

The following table shows Datang’s manufacturing capabilities for helical serrated fin tube:

* This table should be used as a general guide to our capabilities for Welded Helical Serrated Finned tubes.

Grade of material, tube outside diameter to fin height and other factors may limit these capabilities. Please call us for guidance when designing your next finned tube.

This serrated fin configuration can be used for practically any heat transfer application, and is particularly suited to high temperature, high pressure applications with high fin-side temperatures. In general, the serrated fin configuration is said to transfer heat more efficiently than solid fin since the serrated fin segments allow some lateral (cross-fin) flow of fluid along the tube axis, which serves to increase turbulence, thereby breaking up the thermal boundary layer and increasing heat transfer efficiency.

To learn more about this product see Datang’s Standard Specifications for Welded Helical Serrated Finned Tubes.