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Extruded Fin Tubes
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The fins are formed by rotary cold rolling a
smooth, thick walled aluminium tube which has been slid over a
core tube (of the required material specification). The aluminium
is extruded upwards and progressively and uniformly thinned until
screw like fins of the required profile are formed. This rolling
process produces an exact and accurate connection between the
core tube and the finned outer jacket producing good heat
transfer conditions. An additional advantage is that the
aluminium finned jacket provides complete protection of the core
tube against atmospheric corrosion. |
Maximum Operating
Temperature 285°C |
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This fin is produced in the same way as the
extruded fin and has the additional feature of longitudinal slots
in the outer periphery and inclined fin tips. This increases the
air turbulence and increases the overall heat transfer. This type of fin is normally
supplied on a 25mm od or 25.4mm od core tube with a fin outside diameter of 57mm with 24 slots around the periphery.
Maximum Operating
Temperature 285°C |
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The table below shows American material
specifications as an example - materials can be to DIN, BS, AFNOR,
UNI, PN, and many other standards. Please give details in your enquiry.
| Material |
Specification |
| Carbon Steel |
ASTM A179, ASTM A192, ASTM A214,
ASTM A210. ASTM A226, ASTM A334 |
| Alloy Steel |
ASTM A199, ASTM A209,
ASTM A213 |
| Stainless Steel |
ASTM A213, ASTM A249,
ASTM A268 |
| Duplex Stainless Steel |
ASTM A789 |
| Nickel Alloy |
ASTM B163, ASTM B165,
ASTM B167, ASTM B407, ASTM B423, ASTM B444, ASTM 668
ASTM B704 |
| Hastelloy |
ASTM B626 |
| Titanium |
ASTM B338 |
| Copper Alloy |
ASTM B111 |
- Aluminium standard 99.5% purity, other specifications are possible.
| Material |
Specification |
| Aluminium |
PN-79/H-82160 |
DIN-1712 |
ASTM B491 |
| Al99.5 (Al) |
Al99.5 (3.0255) |
1050 |
| Al99.7 (A0) |
Al99.7 (3.0275) |
1070A |
| Aluminium Alloy |
PN-79/H-88026 |
DIN-1725 |
ASTM B221 |
| AlMgSi (Pa38) |
AlMgSi0.5 (3.3206) |
6060/6063 |
Length
| Tube od |
Length |
| 8mm - 16mm |
500mm - 6000mm |
| 19mm - 20mm |
500mm - 12000mm |
| 25/25.4 |
500mm - 15500mm |
| 31.75mm - 50.8mm |
500mm - 155000mm |
Plain Ends
| Tube od |
Length |
| 8mm - 16mm |
60mm |
| 19mm - 50.8mm |
100mm |
Finned tube with ends having a protective aluminium sleeve.
Finned tube with metalised ends for accurate anti corrosion protection.
Finned tubes can be supplied with solid zinc ring tube supports. Two types can be supplied - Zinc Collar type or Alu-Zinc Collar type. The zinc rings give excellent tube support.
Finned tubes can be supplied according to
the dimensions shown in the following tables which give the standard configuration. Sizes not shown in
this table can also be supplied. Please do not hesitate to contact us with your requirements.
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d = tube diameter (od)
d1 = tube diameter at fin root
D = fin tube diameter
s = fin pitch
g1 = fin thickness at fin mid point height
g2 = tube wall thickness
Lo = length of plain end
F = surface area
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Tube od
(d)
mm |
Fin root od
(d1)
mm |
Fin od
(D)
mm |
Fin pitch
(s)
mm |
Fins per
inch |
Fin av thickness
(g1)
mm |
Surface area
(F)
m2/m |
| 8 |
10 |
28 |
2.30 |
11 |
0.35 |
0.51 |
| 10 |
11.6 |
28 |
2.30 |
11 |
0.35 |
0.47 |
| 12 |
13.6 |
28 |
2.30 |
11 |
0.35 |
0.44 |
| 15.875/16 |
17.6 |
30 |
2.30 |
11 |
0.35 |
0.45 |
| 15.875/16 |
18 |
38 |
5.00 |
5 |
0.60 |
0.41 |
| 15.875/16 |
18 |
38 |
3.60 |
7 |
0.45 |
0.55 |
| 15.875/16 |
18 |
38 |
3.17 |
8 |
0.36 |
0.62 |
| 15.875/16 |
18 |
38 |
2.80 |
9 |
0.34 |
0.69 |
| 15.875/16 |
18 |
38 |
2.54 |
10 |
0.32 |
0.76 |
| 15.875/16 |
18 |
38 |
2.30 |
11 |
0.30 |
0.82 |
Tube od
(d)
mm |
Fin root od
(d1)
mm |
Fin od
(D)
mm |
Fin pitch
(s)
mm |
Fins per
inch |
Fin av thickness
(g1)
mm |
Surface area
(F)
m2/m |
| 19/19.05 |
21 |
44 |
5.00 |
5 |
0.60 |
0.53 |
| 19/19.05 |
21 |
44 |
3.60 |
7 |
0.45 |
0.72 |
| 19/19.05 |
21 |
44 |
3.17 |
8 |
0.36 |
0.81 |
| 19/19.05 |
21 |
44 |
2.80 |
9 |
0.34 |
0.90 |
| 19/19.05 |
21 |
44 |
2.54 |
10 |
0.32 |
0.99 |
| 19/19.05 |
21 |
44 |
2.30 |
11 |
0.30 |
1.09 |
| 20 |
22 |
44 |
5.00 |
5 |
0.60 |
0.52 |
| 20 |
22 |
44 |
3.60 |
7 |
0.45 |
0.70 |
| 20 |
22 |
44 |
3.17 |
8 |
0.36 |
0.79 |
| 20 |
22 |
44 |
2.80 |
9 |
0.34 |
0.88 |
| 20 |
22 |
44 |
2.54 |
10 |
0.32 |
0.97 |
| 20 |
22 |
44 |
2.30 |
11 |
0.30 |
1.06 |
Tube od
(d)
mm |
Fin root od
(d1)
mm |
Fin od
(D)
mm |
Fin pitch
(s)
mm |
Fins per
inch |
Fin av thickness
(g1)
mm |
Surface area
(F)
m2/m |
| 25/25.4 |
27 |
50.8 |
5.00 |
5 |
0.60 |
0.67 |
| 25/25.4 |
27 |
50.8 |
3.60 |
7 |
0.45 |
0.89 |
| 25/25.4 |
27 |
50.8 |
3.17 |
8 |
0.36 |
1.00 |
| 25/25.4 |
27 |
50.8 |
2.80 |
9 |
0.34 |
1.12 |
| 25/25.4 |
27 |
50.8 |
2.54 |
10 |
0.32 |
1.23 |
| 25/25.4 |
27 |
50.8 |
2.30 |
11 |
0.30 |
1.35 |
| 25/25.4 |
27 |
57 |
5.00 |
5 |
0.60 |
0.88 |
| 25/25.4 |
27 |
57 |
3.60 |
7 |
0.45 |
1.18 |
| 25/25.4 |
27 |
57 |
3.17 |
8 |
0.36 |
1.33 |
| 25/25.4 |
27 |
57 |
2.80 |
9 |
0.34 |
1.50 |
| 25/25.4 |
27 |
57 |
2.54 |
10 |
0.32 |
1.67 |
| 25/25.4 |
27 |
57 |
2.30 |
11 |
0.30 |
1.80 |
Tube od
(d)
mm |
Fin root od
(d1)
mm |
Fin od
(D)
mm |
Fin pitch
(s)
mm |
Fins per
inch |
Fin av thickness
(g1)
mm |
Surface area
(F)
m2/m |
| 31.75/31.8mm |
34 |
63.5 |
5.00 |
5 |
0.60 |
1.03 |
| 31.75/31.8mm |
34 |
63.5 |
3.60 |
7 |
0.45 |
1.39 |
| 31.75/31.8mm |
34 |
63.5 |
3.17 |
8 |
0.36 |
1.56 |
| 31.75/31.8mm |
34 |
63.5 |
2.80 |
9 |
0.34 |
1.75 |
| 31.75/31.8mm |
34 |
63.5 |
2.54 |
10 |
0.32 |
1.92 |
| 31.75/31.8mm |
34 |
63.5 |
2.30 |
11 |
0.30 |
2.11 |
| 38/38.1mm |
40 |
70 |
5.00 |
5 |
0.70 |
1.17 |
| 38/38.1 |
40 |
70 |
3.60 |
7 |
0.55 |
1.56 |
| 38/38.1 |
40 |
70 |
3.17 |
8 |
0.46 |
1.76 |
| 38/38.1 |
40 |
70 |
2.80 |
9 |
0.45 |
1.98 |
| 38/38.1 |
40 |
70 |
2.54 |
10 |
0.44 |
2.20 |
| 28/38.1 |
40 |
70 |
2.30 |
11 |
0.40 |
2.37 |
Tube od
(d)
mm |
Fin root od
(d1)
mm |
Fin od
(D)
mm |
Fin pitch
(s)
mm |
Fins per
inch |
Fin av thickness
(g1)
mm |
Surface area
(F)
m2/m |
| 50.8/51mm |
52.6 |
82 |
2.54 |
10 |
0.35 |
2.72 |
Home
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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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