Serrated Finned Tube for Heat Exchanger
High-Frequency Helical Serrated Finned Tubes For Heat Exchanger
HFW Serrated Finned Tube,Helical serrated finned tube,Serrated Finned Tube For Heat Exchanger-Boiler Tubes,Helical Serrated Fin Tube,solid helical finned tube or serrated 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.
Serrated Finned Tubes by Material
Serrated Finned Tubes by Application
HFW Helical Spiral Welded Helical Serrated Finned Tubes
Welded Helical Serrated Finned 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.
Serrated Finned Tube for Heat Exchanger
Tube Material:Carbon steel,Stainless steel,Copper,Titanium
Fin Material: Aluminum,Copper,Steel
Tube OD:19-273mm
Tube Thk:2.0-15.0mm
Fin Thk:0.5-3.0mm
Fin Pitch:3.0-30.0mm
Fin Height:8.0-16.5mm
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.