ASTM A106 A333 A179 A210, P5 P11 P22 P9, Longitudinal Finned Tube
LONGITUDINAL FINNED TUBE
Longitudinal finned tubes are produced by welding fins with resistors along the length of the tube. The fins are first formed into a U-shaped channel, allowing each U-shaped leg to form a fin. The channel is cut to the appropriate length and then welded in place along the length of the tube and resistors. The channels are welded in pairs, at opposite poles, so the number of fins specified must be a multiple of four. For a given tube or tube size, the required heat transfer surface area per unit length of tube can be obtained by specifying the appropriate fin height and number of fins.
| Product Specification | ||
| Tube OD | 16~273 (mm) | 3/8”~10”(NPS) |
| Tube Wall Thk | 2.11~25.4 (mm) | 0.08”~1” |
| Tube Length | ≤12,000 (mm) | ≤39 ft |
| Fin Thk | 1.0~1.5 (mm) | 0.04”~0.06” |
| Fin Height | 5~25 (mm) | 0.2”~0.98” |
| Fin Pitch | 1U~36U | |
| Fin Type | “U”or“I/L” | |
| Material Combinations | ||
| Fin Material | C.S. (most common grade: Q235B) | |
| S.S. (most common grade are AISI 304, 316, 409, 410, 321,347) | ||
| A.S. | ||
| Tube Material | C.S. (most common grade: A106 Gr.B) | |
| S.S. (most common grade are TP304,316, 321, 347) | ||
| A.S. (most common grade are T/P5,9,11,22,91) | ||
LONGITUDINAL FINNED TUBE MATERIAL:
1.Carbon steel
2.Stainless steel
3.Alloy steel
4.Brass
Quality Control for LONGITUDINAL FINNED TUBE
Inspection and Tests Performed
Chemical Composition inspection,
Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test),
Surface and Dimension Test,
No-destructive Test,
Hydrostatic Test.
Application Of LONGITUDINAL FIN TUBE
steel, petroleum, chemical industy,machinery, shipbulding, power station, hospital and food industy.
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