Low Fin Tubes
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Used in shell & tube heat exchangers, condensers, air conditioners, refrigeration coolers, evaporators, liquified gas coolers, oil coolers. The fins are integral with
the tube with an enhanced outside surface area. The integral structure gives excellent
thermal conductivity, strength and anti-vibration fatigue
property. |
 |
Formation of fins - by cold rolling the
outer surface of a plain tube to produce screw type fins having
the same outside diameter as the original tube. The fins are integral with the tube giving excellent heat transfer. Internally the
tubes are plain. Foe special applications the tubes can be supplied with internal fins. Unfinned sections (lands or skips) can be supplied. Ends can be supplied plain or tubes can be fully finned. The outside surface area is approximately 2.5 to 3 times that of an equivalent plain tube.
Materials - copper, copper alloys,
aluminium, carbon steel, alloy steel, stainless steel, duplex stainless steel, nickel alloys, titanium.
Fin pitches from 16 to 40 fins per inch (630 to 1575 per metre).
Finned tubes can be supplied as finned or annealed.
The finned tubes can be supplied as U tubes with the bend area finned or plain.
The low fin tube size is commonly referenced with a 6 figure code number. For example the code 195065 refers to a low finned tube having:
19 Fins per inch i.e. 19 fins per inch
5 Fin root diameter in 1/8ths of an inch i.e. 5/8ths of an inch root diameter
065 Wall thickness of the finned section in 1/1000ths of an inch i.e. 0.065" wall thickness in the finned section
The finned tubes are manufactured in accordance with international standards such as ASTM B359, ASTM A498, DIN 17679
The following table gives dimensions for a typical range of tube diameters. Sizes not shown in
this table can also be supplied. Please do not hesitate to contact us with your requirements.
| Do = od of plain ends/lands |
dw = id of finned section |
Dp = root diameter of finned section |
| Dz = od of finned section |
s = wall thickness at plain ends/lands |
g = nominal fin thickness |
| t = fin pitch |
l = plain end/land length |
L = overall length |
Do
mm |
dw
mm |
Dp
mm |
Dz
mm |
s
mm |
g
mm |
l
mm |
L
m |
t
fins/inch |
| 10 |
5.5 |
7.1 |
9.8 |
1.0 |
0.3 |
6-25 |
10 |
19 |
| 11 |
6.5 |
8.1 |
10.8 |
1.0 |
0.3 |
6-25 |
10 |
19 |
| 12 |
7.4 |
9.1 |
11.8 |
1.0 |
0.3 |
6-25 |
10 |
19 |
| 16 |
11.5 |
13.1 |
15.8 |
1.5 |
0.3 |
10-25 |
10 |
19 |
| 19 |
14.5 |
16.1 |
18.8 |
1.5 |
0.3 |
10-30 |
12 |
16/19/25 |
| 22 |
17.5 |
19.1 |
21.8 |
1.5 |
0.3 |
10-30 |
12 |
16/19/25 |
| 25.4 |
20.5 |
22.5 |
25.2 |
1.5 |
0.3 |
10-30 |
12 |
16/19/25 |
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Air Cooled Heat Exchangers
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Shell & Tube Heat Exchangers
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High Fin Tubes
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Medium Fin Tubes
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Low Fin Tubes
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Applied Fin Tubes (G,L,LL,KL)
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Extruded Fin Tubes
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Copper Fin Tubes
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Special Copper Fin Tubes
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Carbon Steel Plain Tubes
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Stainless Steel Plain Tubes
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Copper Based Alloy Plain Tubes
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Titanium Plain Tubes
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'U' Tubes
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Explosive Clad Tubeplates
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Tubeplates
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Copper Alloys
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Wastewater Treatment
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Castings
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