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Overview
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 or number of fins per meter of length.
This welded steel finned tube configuration can be used for any practically heat exchanger application, and is particularly suited to high temperature and high pressure applications. The important features of this configuration are efficient, effective bond of fin to tube under all conditions of temperature and pressure, and ability to withstand high fin-side temperatures. A continuous helical fin is attached to the base tube by high frequency electric resistance welding in order to give an efficient and thermally reliable bond.
HFW Solid Finned Tube's Function
Base Tube Details
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. (common grade: 08F, SPCC) S.S. (common grade: AISI 304, 316, 409, 410, 321,347 ) A.S. | |
Tube Material: | C.S. (common grade: A106 Gr.B, A210, A192) S.S. (common grade: TP304, 316, 321, 347 ) A.S.(common grade: T/P5,9,11,22,91 ) Duplex Steel(most common grade: S32205 etc. ) |
Application: