Low-fin (integral) tube is an extruded tube composed of short and low fins, and a high-efficiency heat-exchange tube type in which threaded fins are formed on the outer surface of the heat-exchange tube by rolling. The tube and fin are in the same piece of tube, also known as "N" fin type.
Because Low Finned Tube is an integral tube, there is only one material for the tube and fins
We offer you a wide range of materials and can expand our offering at any time to meet your specific needs in terms of thermal conductivity, mechanical properties or corrosion resistance.
Standard Specification for Low Finned Tubes
Carbon Steel: ASTM A 498
Stainless Steel: ASTM A 1012
Copper and Copper Alloys: ASTM B 359
Titanium and Titanium Alloys: ASTM B 891
Material:
Carbon Steel: A179, A192, SA210 Gr A1/C,
Stainless Steel: SA 213/A 213 TP304/304L, TP316/TP316L/316Ti,
Duplex Stainless Steel: SA 789 S31803/S2205,
Copper and copper alloys SB 111 / B 111 UNS12200/UNS14200/UNS70600, CuNi70/30, CuNi 90/10,
Titanium and titanium alloys: SB 338 / B 338 GR1 GR2 GR3 GR5 GR6 GR7 GR9 GR12 GR16 GR17 etc.
Low Finned Tube Quick Details:
Fin type: Solid plain
Outer diameter (OD): 12.7mm~25.4mm
Tube length: up to 25000mm
Fin height: 1.2mm ~2.77mm
Fin thickness: about 0.3mm
Fin pitch: 30 FPI/28 FPI/26 FPI/36 FPI/43 FPI
Additional Info
Payment Terms:T/T, LC
Delivery: 15-30 days after payment
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Iron frame packing boxes and the desiccants are put into each package for continental transportation as well. or as required
The case of Low Finned Tube
Data sheet of Low Fin Tubes
| Plain tube (mm) |
Finned section dimensions (mm) |
Ratio |
De |
| D×t |
Tp |
dd |
dr |
di |
η |
mm |
| 19×2 |
0.8 |
18.8 |
17 |
134 |
2.8 |
17.9 |
| 19×2 |
1 |
18.8 |
16.8 |
13.4 |
2.5 |
17.8 |
| 19×2 |
1.25 |
18.8 |
16.6 |
13 |
2.2 |
17.8 |
| 19×2 |
1.5 |
18.8 |
16.6 |
13 |
2 |
17.7 |
| 19×2 |
2 |
18.8 |
16.4 |
13 |
1.7 |
17.5 |
| 25×2.5 |
0.8 |
24.8 |
23 |
18.8 |
2.8 |
23.9 |
| 25×2.5 |
1 |
24.8 |
22.6 |
18.8 |
2.75 |
23.7 |
| 25×2.5 |
1.25 |
24.8 |
22.3 |
18 |
2.5 |
23.6 |
| 25×2.5 |
1.5 |
24.8 |
22.3 |
18 |
2.2 |
23.5 |
| 25×2.5 |
2 |
24.8 |
22 |
18 |
1.8 |
23.4 |
| 25×2.5 |
2.5 |
24.8 |
22 |
18 |
1.6 |
23.3 |
D------Outside diameter of plain end section
Dof----Diameter of top fins
Dr-----Root diameter of finned section
Di-----Inside diameter of finned section
T------Wall thickness of plain end section
Tp-----Fin pitch
De----Equivalent diameter of finned tube
L------Plain tube end length |
| Please email us for more information. |
We can provide monolithic low finned tubes with no fin section clearance (min. 5mm) in the middle of the core tube, or bent to the designed bend radius.
Example:
Manufacturing Process:
Low fin (integral) tube is an extruded tube consisting of short low fins, the fins are rolled out from the outer wall of the plain tube by rollers, and the tube and fins are in the same piece of tube.
Delivery conditions:
The tube ends are square cut, free of burrs, dry and blown clean on the inside and varnished on the outside.
Put desiccant in each package for continental shipping.
Quality Test:
The integral low fin tube quality is assured by hydrostatic or pneumatic tests, eddy current tests & MARCO tests in order to verify design specifications.
Acceptance ceritia:
WOLVERINE / HPT / GEWA-K & GEWA-KS
Features of Low Finned Tube
1. The processing cost is low;
2. The low-finned tube is formed by directly rotating the steel tube to form fins, so there is no need to worry about falling off even if it is bent later.
3. Has excellent durability and anti-vibration performance.
4. Increase the external surface area of the bare tube by 2.5-3 times, improve the efficiency of the heat exchanger, and improve the performance of the existing heat exchanger.
5. The reduction in space and weight is very valuable for offshore production or high altitude distillation columns. Low-fin technology can transform large shell and tube heat exchangers into compact heat exchangers
6. It has a wide range of applications and can strengthen the evaporation, condensation, gaseous heat transfer and liquid heat transfer of the medium on the shell side;
Application of Low Finned Tube
As long as the medium on the shell side is relatively clean, free from corrosion and scaling, low finned tubes can be used as heat exchange elements to form a low finned tube type high-efficiency heat exchanger.
Packaging picture of Finned Tube
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