Project Description

Fin Tubes (Carbon steel, Stainless steel, Copper alloy and Titanium Alloy)

Fin Tubes materials include Carbon steel, Stainless steel, Copper Alloy and Titanium Alloy.

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Application:

Fin tubes are widely used in Sinopec, PetroChina, CNOOC, electric power, metallurgy and other industries. Due to the high quality of our products, fast and punctual delivery, reasonable price and good after-sales service, our company has acquired the recognition of the industry and the trust of our clients.

The common application fields are:

  • Heat exchangers units for power plant (electric, nuclear, thermal and geothermal power plants);
  • High corrosive systems (condensers, evaporators, sea water desalinations, fertilizing, urea systems, ammonia, gas, corrosive acids);
  • The petroleum, chemical and petrochemical industries;
  • The food processing and refrigeration industries;
  • Natural gas treatment;

Fin tube Type:

  • Extruded fin tube

T-type fin tube

T fin tube is a kind of highly efficient heat exchange tube that is made by rolling processing and molding of the light pipe. Its structure characteristic is forming a series of spiral ring T tunnel on the outside the pipe surface.

The medium outside the pipe forms a series of bubbles in the tunnel nuclear when heated. And because the tunnel cavity is in a heated state, the bubble nucleus rapidly expands and increases the inside pressure rapidly by continuously heating, then erupts from a crack in the pipe surface. There is a strong flush power and a certain negative pressure with the bubbles erupting, and which makes the low temperature liquid flow into the T tunnel forming the constant boiling. This way of boiling sends out the heat is much large than the light pipe in an hour and a surface square, so T-type tube has the higher ability of boiling heat transfer.

T-shaped fin tube features:

Good heat transfer effect. The coefficient of heat boiling is 1.6~3.3 times higher than the light tube in the R113 working medium.

Only when the heat medium temperature is higher than the boiling point of cold medium or bubble point is 12 ºC to 15 ºC, the cooling medium can bubbly boils in a regular light tube heat exchanger. Instead, cold medium can be boiling When the temperature is just 2ºC to 4ºC in the t-shaped fin tube heat exchanger. And the bubbling is close, continuous, and rapid. So, the T-type tube forms the unique advantages compared with the light pipe.

With CFC 11 for medium single-tube experiment showed that the boiling up heating coefficient of T-type is 10 times of the light pip. For small bundles of liquid ammonia medium experimental results that the total heat transfer coefficient of T-type tube is 2.2 times of the light pipe. The reboiler industrial calibration of C3 and C4 hydrocarbon separation tower shows that, the total heat transfer coefficient of T-type tube is 50% higher than the smooth tube in the low load, and 99% higher in the heavy load.

It is not easy to scale both within and outside the tube T tunnel slot surface due to the fierce disturbance of internal gas-liquid and seam gas quickly jetting along T high, which ensures the equipment can use for a long time and the heat transfer effect is not affected by scale.

 

Carbon-steel low fin tube (threaded pipe)

Due to the features that higher heat transfer coefficient, larger heat transfer area and less consumption of steel etc., Threaded pipe has been recognized as a kind of strengthening heat transfer element. The research report pointed out that the design of is reasonable. So, the flue gas heat transfer efficiency of threaded pipe is 1. 6 times of light tube. Because the threaded pipe has the remarkable characteristics, it has been more and more widely used in boiler manufacture.

Features:

The heat transfer of a thread smoke tube is as the same as that of 1.7 to 1.8 root ordinary pipes after application of the optimization of heat transfer and flow resistance when it is used on the boiler. This not only can reduce the pipe numbers, but also can lessen the diameter of the pot shell, thus, to save the steel and to cut down capital.

The heat transfer surface area is 1.5 to 2.0 times of the light pipe, this greatly improves the activity of the cooling methods and strengthen the tube inside boiling and condensation transfer effects in the application of air conditioning refrigeration industry.

Setting up in heat exchange equipment application on decoration, steel or stainless-steel tube through a molding machine rolling, spiral tube fouling is spiraling in appearance, set decoration equipment running line temperature changes make the pipe produces expansion and contraction, thus can make the dirt to fall off; For the cylinder and the light pipe scale layer, without the power off.

Extruded finned tube

Aluminum finned tube (steel-aluminum composite) technology parameters.

Finned tube is composited with iron-aluminum or copper-aluminum tube rolling out the fin, which feathers are tightness, small heat resistance, good heat transfer performance, high strength, small flow losses, strong corrosion resistant performance, not easy to deformation and a long working lifetime in cold and hot conditioned.

Overall rolling fin is smooth and has no burr, so it is easy to clean. It is easy to make the fin surface wet and cooled with water when makes it cold during heating air-conditioning engineering. In the situation with drying, heating and other heat exchanging, its surface is handles by anodizing, which with beautiful color and luster, and can effectively prevent surface corrosion.

Aluminum rolling finned tube is rolling as a whole by the aluminum tube, which has the feather that no contact thermal resistance, high strength, thermal shock and mechanical shock, good thermal performance, and considerable expansion heat transfer surface. The heat exchanger with this kind of finned tube is ahead of the string or around the plate ones.

According to user needs, we can produce all kinds of steel strip winding finned tube and steel aluminum composite finned tube.

As the heat transfer element finned tube works long-term in high temperature and flue gas condition, such as finned tube in the boiler heat exchanger which use conditions are as high temperature and high pressure and corrosive atmosphere, should have a high-performance metrics and they are as follows: Anti-corrosion, Anti-wear, lower contact resistance, Higher Stability, Anti-dust stratification.

Corrugated tube (expansion wave tube)

High heat transfer efficiency

The special design of peaks and troughs makes the fluid in expansion wave tube forms a strong turbulence because of the section continuous mutation inside and outside the pipe. Even when the flow velocity is small, the fluid in the tube inside and outside all can form strong disturbance, greatly improving the heat transfer coefficient of heat exchange tube. The heat transfer coefficient of expansion wave tube is 2 ~ 3 times higher than a traditional tube heat exchanger.

non-fouling, non-blockage, and non-dirty, smooth operation

In the process of work, on the one hand, the media of expansion wave tube inside and outside always is in a highly turbulent state, to makes it hard for solid particles in the medium deposit scale, on the other hand, Affected by the medium temperature difference expansion wave tube may be out of shape as infinitesimal axial expansion, at the same time, the curvature of the tube inside and outside can has a change. Due to the coefficient of linear expansion between dirt and bellows tube is very wide, a larger pulled off force between dirt and heat exchange tube will produce, so even if there are scale, they could burst up and off automatically, and keeping the heat exchanger has always been persistent and highly efficient performance. At the same time, there is no congestion because the channel is wide, the pressure drop is small, and the energy-saving effect is obvious.
Automatic compensation function

The special structure shape makes the expansion wave tube can effectively reduce the thermal stress, do not need to set expansion joint in the heat, which simplifies the structure of products and improves the reliability of the product.

Reliable, safe and strong

The existences of the peaks and troughs make the expansion wave tube axial expansion ability enhancement, effectively reduces the temperature difference stress, can adapt to the changing of the large temperature difference and pressure so that it can’t be leaks of tube rupture caused by the phenomenon. With a unique connection technology, Baffle plate and bellows tube prolong the service life of heat exchanger.

  • Wound fin tube

KL-type finned tube
KL-type finned tube is also called the knurling finned tube, that is rolling pattern on the base tube before rounding the fins, or setting up a blade on a winding machine, then knurling on the base tube, at the same time winding, knurling and rounding tablets by the back blade.

Scope of application:

A, the highest using temperature is 250 ºC or less 250 ºC.

B, the highest working pressure is 3.2 MPa or less 3.2 MPa.

Characteristics and advantages:

A, higher heat transfer performance and smaller contact thermal resistance

B, larger contact area between fins and tube, fitting tightly and securely

C, good resistance to atmospheric corrosion performance, stable performance of long-term using

LL-type finned tube

LL-type finned tube makes the trapezoidal cross-section forming by rolling combine closely   with the heat flux density distribution size. The fins combine tightly with the tube, which makes the thermal efficiency higher and put an end to thermal resistance that brings by the non-eliminate contact from segment gap of the string type finned tube.

Working temperature: 230 ºC

1 Features:

The winding technology improves production efficiency and heat transfer, makes the average fin pitch and higher proportion between fins and tube. At the same time, the base tube can be protected from air erosion.

2 Application:

LL-type finned tube mainly used in petrochemical, electric power, paper making, tobacco, building heating and other industry such as air cooler, air heater and air heater of food industry, plant starch spray drying system.

L-type finned tube

L-type finned tube makes the trapezoidal cross-section forming by rolling combine closely   with the heat flux density distribution size. The fins combine tightly with the tube, which makes the thermal efficiency higher and put an end to thermal resistance that brings by the non-eliminate contact from segment gap of the string type finned tube.

Working temperature: 230 ºC

1 Features:

The winding technology improves production efficiency and heat transfer, makes the average fin pitch and higher proportion between fins and tube. At the same time, the base tube can be protected from air erosion.

2 Application:

L-type finned tube mainly used in petrochemical, electric power, paper making, tobacco, building heating and other industry such as air cooler, air heater and air heater of food industry, plant starch spray drying system.

  • Embedded fin tube

G type finned tube

G type embedded spiral finned tube is processed from a certain width in the steel pipe and spiral groove depth, then inlays the ribbon on the steel pipe by the equipment. In winding process, as the pre-tightening force to a certain extent so the strip will be firmly in the spiral groove, to ensure there is a certain contact area between steel band and steel pipe. In order to prevent the strip spring falling off the light tube, the two ends of the steel strip need to weld onto the steel pipe. In order to set easily, there should be a certain clearance between steel belt and spiral groove. If the clearance is too small the setting process will be difficult to proceed smoothly. In addition, the steel belt of winding there will always be a certain amount of rebound, which makes it cannot very good joint among the steel belt and spiral groove bottom. Inlaid fins can be conducted on general equipment, and they cost little. McElroy companies in the United States the company I used the advanced production equipment, slotting embedding technology is advanced, from stable, embedded and firm, pulled off force not less than 70 n, the allowable temperature can reach 400 ºC, has the strong ability of temperature resistance and thermal shock, widely used in petrochemical air cooler.

  • Welded fin tube

High frequency welding spiral fin tube

High frequency welding spiral fin tube is a new kind of heat transfer material which has the feature of wearing resistance and highly efficient. And it is a kind of high efficiency and energy saving heat transfer element.

It adopts high frequency welding spiral technology, the national patent technology with high frequency power supplies as the heat source to heat the steel strip, steel pipe at the same time, we make its welded together as a whole. This technology has the characteristics as high in thermal efficiency, large heat dissipation area, long service life, range adaptation temperature, high pressure, etc.

Widely used in waste heat recovery, petrochemical industry, power plant boiler, economizer, coaches, civil building heating, refrigerating, drying, medicine of wood drying, food drying system and other industries.

The advantages of high frequency welding spiral fin tube:

1. The simple and economic installation

The maximum length of high frequency welding spiral finned tube can reach 6 meters, that reduces the join points, making the installation more economic, efficient, and also reduces the leakage probability of joints.
2. Easy maintenance

After installation, high frequency welding spiral fin tube needs no longer to be maintained.
3. High efficiency

The heat dissipation area of high frequency welding spiral fin tube is more than 8 times of the light tube. The internal is smooth, so the internal flow resistance is small.
4. Long service life

Fin and pipes with high mechanical strength, so the tensile strength is more than 200 mpa. Both inside and outside of the tube are all made of hot dip galvanized processing.

Weldable fin material: carbon steel, stainless steel, alloy steel, corrosion resistant steel.

Weldable fin form: real tooth, tooth.

U Type-High frequency welding spiral fin tube

High frequency welding spiral fin tube is a new kind of heat transfer material which has the feature of wearing resistance and highly efficient. And it is a kind of high efficiency and energy saving heat transfer element.

It adopts high frequency welding spiral technology, the national patent technology with high frequency power supplies as the heat source to heat the steel strip, steel pipe at the same time, we make its welded together as a whole. This technology has the characteristics as high in thermal efficiency, large heat dissipation area, long service life, range adaptation temperature, high pressure, etc.

Widely used in waste heat recovery, petrochemical industry, power plant boiler, economizer, coaches, civil building heating, refrigerating, drying, medicine of wood drying, food drying system and other industries.

The advantages of high frequency welding spiral fin tube:

  1. The simple and economic installation

The maximum length of high frequency welding spiral finned tube can reach 6 meters, that reduces the join points, making the installation more economic, efficient, and also reduces the leakage probability of joints.

  1. Easy maintenance

After installation, high frequency welding spiral fin tube needs no longer to be maintained.

  1. High efficiency

The heat dissipation area of high frequency welding spiral fin tube is more than 8 times of the light tube. The internal is smooth, so the internal flow resistance is small.

  1. Long service life

Fin and pipes with high mechanical strength, so the tensile strength is more than 200 mpa. Both inside and outside of the tube are all made of hot dip galvanized processing.

Weldable fin material: carbon steel, stainless steel, alloy steel, corrosion resistant steel.

Weldable fin form: real tooth, tooth.

Fin tubes information:

Bare tube general material: Carbon Steel, Copper, Stainless Steel, Alloy.

Bare tube OD: 10-38mm

Fin pitch: 0.6-2mm

Fin height: <1.6mm

Fin thickness: ~0.3mm

Note:

  • Mill test certificates will be issued according to EN10204.3
  • All tubes shall be supplied as per applicable Specification.

PHOTOS

Carbon Steel Fin Tubes

Carbon Steel Fin Tubes

Copper Aluminum Combined Fin Tubes

Copper Aluminum Combined Fin Tubes

Packing and Marking

  • Packed in ply wooden box wrapped in plastic, and suitably protected for sea-worthily delivery or as requested.

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Packing photos:

Fin Tubes Wooden Case Package

Fin Tubes Wooden Case Package

Get in Touch

If you are interested in our products or cooperation with us, even having a comment or a suggestion, please contact us now for more detailed information.

Tel.: +86 185 5109 0083 | E-mail: cts@ctstubes.com

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