dtfinnedtube.com
Production of Low Finned Tubes for heat exchanger
Low Finned tube (also called Trufin tubes) is a finned tube obtained through plastic cold deformation.
The method consists in realizing, from a smooth tube, fins with a particular geometric form without removing material; this plastic deformation causes an increment of heat exchange efficiency, and allows to reduce the heat exchanger size.
Technical specification – Low Fin Tubes
It is possible to produce integral low finned tubes with different materials and dimensions, on customer request.
Low Fin Tube for heat exchanger
Helpful for the dropping of the cold condensate at the bottom of the tube, reducing the liquid film and thermal resistance but improving the heat transfer efficiency.
Reduced size and cost saving, but with increased performance of existing equipment.
Providing 3 times of external surface heat transfer area than bare tube
Wide application, strengthen evaporation, condensation, gaseous heat and liquid heat transfer for shell medium.
Low Fin Tube
Datang Low finned tubes are widely used as heat transfer tubes in petrochemical industry,natural gas plant, Ship-building, Power plant and Desalination plant. They can enhanced surface fin tubes allow either reducing the size of the heat exchanger or increasing its performance.
It is possible to produce integral low finned tubes with different materials and dimensions, on customer request.
Standard Dimensions – Low Finned Tubes
| Outside Diameter | Thickness | Length | Fin Density | ||||
|---|---|---|---|---|---|---|---|
|
(mm)
|
(inch)
|
(mm)
|
(BWG)
|
(m)
|
(ft)
|
(fins/inch)
|
(fins/m)
|
|
12.00 ÷ 60.00
|
0.47 ÷ 2.4
|
0.635 ÷ 4.572
|
23 ÷ 7
|
0.3 ÷ 25
|
1 ÷ 82
|
8 ÷ 48
|
315 ÷ 1890
|
Materials – Low Finned Tubes
| Materials | |
|---|---|
|
Carbon Steel
|
SA 179 / A 179
|
|
Carbon Steel
|
SA 210 / A 210
|
|
Carbon Steel
|
SA 334 / A 334
|
|
Stainless Steel
|
SA 213 / A 213 | SA 249 / A249
|
|
Duplex Stainless Steel
|
SA 789 / A 789
|
|
Copper & Cu Alloys
|
SB 111 / B 111 | SB 75 / B 75
|
|
Titanium & Ti Alloys
|
SB 338 / B 338
|
For different materials please contact our sales department.
Standard Technical Specifications – Low Finned Tubes
| Standard Technical Specifications | |
|---|---|
|
Carbon Steel
|
ASTM A 498
|
|
Stainless Steel
|
ASTM A 1012
|
|
Copper and Copper Alloys
|
ASTM B 359
|
|
Titanium
|
ASTM B 891
|
For different materials please contact our sales department.
Inspections and Tests
- Chemical Composition
- Mechanical Properties
- Hydrostatic Test
- Pneumatic Test
- Boroscopic Inspection
- Eddy Current Test
Also available
Condenser Tube (Y-fin)
Condenser tubes (Y-fin low finned tubes) are specific heat exchanger tubes that play important roles in the refrigeration cycle.
Condenser tubes are responsible for releasing heat from the refrigerant. They are typically located on the hot side of the system, where they transfer heat from the refrigerant to the surrounding fluid.
Evaporator Tube (T-fin)
Evaporator tubes (T-fin low finned tubes) are specific heat exchanger tubes that play important roles in the refrigeration cycle.
Evaporator tubes are usually located on the cold side of the system and are responsible for absorbing heat from the surrounding environment.
In several applications, heat exchangers could have a poor performance on tube side, so it is possible to increase inner heat transfer coefficient with low finned tubes with inner grooves.
Inner grooved tubes are heat exchanger tubes with helically formed grooves on the inner surface of the tube. These grooves create turbulence in the fluid flowing through the tube and increase the surface area in contact with the fluid, which improves heat transfer efficiency.
Knurled Finned Tubes or Diamond Finned Tubes
Knurled finned tubes (or Diamond finned tubes) are heat exchanger tubes with an unique diamond-shaped fin design.
This type of tubes are the best choice for inner tubes in leakage detector system.
Corrugated Finned Tubes
Corrugated finned tubes are specialized heat exchanger components designed to enhance heat transfer in various industrial applications with special focus on cleaning of tubes during their life. These tubes feature a corrugated or wavy finned surface on the outside, which increases their heat transfer efficiency compared to smooth-walled tubes.
The corrugated or wavy fins on the exterior of these tubes disrupt the boundary layer of air or fluid flowing over them. This disruption increases turbulence and promotes better heat transfer between the tube wall and the surrounding medium, whether it’s a gas or a liquid.
The corrugated design also helps reduce fouling on the tube surface by discouraging the accumulation of debris or deposits.
Applications – Low Finned Tubes
The common application fields are:
- heat exchangers for power plants (electric, nuclear, thermal and geothermal power plants)
- high corrosive systems (condensers, evaporators, sea water desalinations, fertilizing, urea systems, ammonia, gas, corrosive acids)
- chemical and petrochemical industries
- food processing and refrigeration industries.
Research and Development
Research and Development (R&D) activities are crucial for an innovative company to stay competitive, create new products or services, improve existing ones, and drive growth. These activities involve systematic investigation and experimentation, aimed at discovering and applying new knowledge and technologies.
Our low finned tubes are used in heat transfer solution worldwide.
Power Generation
Oil and Gas Productions
LNG NGL LPG Plants
Refining
Petrochemical and Chemical Processing
Air Conditioning and Refrigeration
Manufacturing
Our plant capability:
4 finning production lines and 4 ‘U’ bending lines
Fins per inch-19, 26, 28
Materials- Carbon steel, stainless steel, copper nickel and monel alloy 400
Tube OD- 15.88mm to 25.40mm
Max Tube Length-30 metres
Bending-up to 30 metres max developed length
Test capability-air under water and Hydrotest
Heat treatment-electric resistance stress relief annealing
Benefits of Low Finned Tubes:
Offers 2.5-3 times the external surface area of bare tube
Enhanced heat exchanger efficiency means less tube is required to accomplish the same heat transfer as a bare tube
Low finned tube can increase the performance of an existing exchanger without the difficult and expensive task of building new shells etc
Reduced space and weight can be extremely valuable in offshore production or high elevation distillation columns. Low finned technology can transform large shell and tube exchangers into compact heat exchangers
