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Longitudinal I/L or U-finned tubes are made with resistance welded fins along the length of the tube. The fins are first formed into a U-shaped channel so that each side of the U forms a fin. The channel is cut to the appropriate length, then oriented and resistance welded along the length of the tube. The channels are welded in pairs, diametrically opposed, so the number of fins specified must be a multiple of 4.
For a given tube or pipe 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. The number of fins depends on the outside diameter of the tube – larger outside diameter tubes can accommodate more fins.
Tube Material:Carbon steel,Stainless steel,Copper,Titanium
Longitudinal Finned Tube For Heat Exchangers Quick Details:
Core tube material: carbon steel, low alloy steel, stainless steel, brass, copper, copper-nickel alloy, aluminum bronze, nickel
alloy.
1. Carbon steel: A179, A192, SA210 Gr A1/C, A106 Gr B
2. Stainless steel: TP304/304L, TP316/TP316L
3. Copper: UNS12200/UNS14200/UNS70600, CuNi70/30, CuNi 90/10
4. Titanium: B338 Gr 2
Fin material: aluminum, copper, steel
1. Aluminum (Alu.1100, Alu.1060)
2. Copper.
3. Steel
Fin type: U-fin, perforated, twisted…
Tube Outer Diameter: Min. 19mm.
Tube length: up to 18 meters.
Number of fins: 2/4/8/16/18/32/36 pieces per row
Number of fins: 16/20/24/32/40
Surface Protection: Both bare ends shall be zinc or aluminum metallized by electrospray arc system coating.
Accessories: Tube support boxes, clamps or spacer boxes (materials: aluminium, zinc and stainless steel).
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Base Tube O.D (mm)
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Base Tube Thickness (mm)
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Fin Height (mm)
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Fin Thickness (mm)
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Fin NO.（Pc）
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19 mm ~76 mm
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2.0 mm ~6.0 mm
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6.0 mm ~32.0 mm
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0.8 mm ~1.2mm
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4,8,16,24,32,40,48
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Base Tube Material
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Fin Material
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Tube Length (Mtr)
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Carbon Steel ,Alloy Steel ,Stainless Steel
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Carbon Steel ,Alloy Steel ,Stainless Steel
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≤ 15Mtrs
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