What is HFW solid finned tube?
HFW Solid Finned Tubes short for High Frequency Welded Helical Spiral Solid Finned Tube. HFW Solid Finned Tubes are manufacturer by helically wrapping and continuous weld fin strip on tube.
How to produce high frequency welded spiral finned tube?
High frequency welded spiral finned tube is to use the skin effect and proximity effect of high frequency current to heat the steel strip and the outer surface of the steel tube until the plastic state or melting, while the steel strip is wound around the steel tube. The welding is completed under a certain pressure when the steel strip is wound. This kind of high-frequency welding is a solid phase welding. Compared with inlay, brazing (or overall hot galvanizing) and other methods, it is more advanced in terms of product quality (high welding rate of fins, up to 95%), productivity and automation.
HFW Solid Finned Tube Size and material:
Tube O.D.: | 16 to 273 (mm) | 3/8” to 10”(NPS) |
Tube Wall Thk.: | 2 to 28.6 (mm) | 0.08” to 1.1” |
Tube Length: | ≤28,000 (mm) | ≤92 ft |
Fin Thk.: | 0.5 to 3.5 (mm) | 0.02” to 0.14” |
Fin Height: | 8 to 35 (mm) | 0.31” to 1.3” |
Fin Pitch: | 3 to 333 FPM | 1 to 8 FPI |
Fin Type: | Solid, “U”or“V” Serrated | |
Fin Material: | C.S. (most common grade: 08F, SPCC)
S.S. (most common grade are AISI 304, 316, 409, 410, 321,347 ) |
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Tube Material: | C.S. (most common grade: A106 Gr.B, A210, A192)
S.S. (most common grade are TP304, 316, 321, 347 ) A.S.(most common grade are T/P5,9,11,22,91 ) Duplex Steel (most common grade are 2205 etc. ) |
Helical Solid Finned Tubes are manufacturer by helically wrapping continuous fin strip on tube. HF Resistance Welding Usually Employs Frequency Of 400 kHz. The fin wound around the tube And Continuous weld. The fin strip is wounded spirally onto the tube and welded continuously with a high frequency electrical process to the base tube along the spiral root. The fin strip held under tension and confined laterally as it is formed around the tube, thereby ensuring that the strip is in forceful contact with the base tube surface. A continuous weld is applied at the point where the fin strip first begins to bend around the tube diameter, using the gas metal arc welding process.
For a given tube or pipe size, the desired heat transfer surface area per unit length of tube can be obtained by specifying the appropriate fin height, fin thickness and /or number of fins per meter of length.
Characteristics of High Frequency Welded Solid Finned Tubes
HFW Solid Finned Tube Advantages:
Address :
Jl. K.H. Zaenal Mustafa No. 17
Jatinegara Jakarta Timur 13350
Phone : 62 21 8561234 ( Hunting )
Fax : 62 21 8513109
E mail : info@fintubes.co.id