Carbon Steel Stainless Steel Copper Alloy And Titanium Alloy Fin Tube

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 standard application fields are:

• Heat exchangers units for power plants (electric, nuclear, thermal, and geothermal power plants);
• High corrosive systems (condensers, evaporators, seawater desalination, 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 highly efficient heat exchange tube made by rolling processing and molding of the light pipe. Its structure characteristic forms a series of spiral ring T tunnels 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 solid flush power and a certain negative pressure with the bubbles bursting, which makes the low-temperature liquid flow into the T tunnel, forming the constant boiling. This way of boiling sends out heat much larger than the light pipe in an hour and a surface square, so a T-type tube has a higher ability to transfer heat.

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.

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

CFC 11 for medium single-tube experiment showed that the boiling up heating coefficient of T-type is ten times that of the light pip. For small bundles of liquid ammonia medium experimental results, the total heat transfer coefficient of the T-type tube is 2.2 times that of the light pipe. The reboiler industrial calibration of the C3 and C4 hydrocarbon separation tower shows that the total heat transfer coefficient of the 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 of that higher heat transfer coefficient, larger heat transfer area, and less consumption of steel, etc., Threaded pipe has been recognized as a strengthening heat transfer element. The research report pointed out that the design is reasonable. So, the threaded pipe’s flue gas heat transfer efficiency is 1. 6 times that of the light tube. Because the threaded pipe has remarkable characteristics, it has been more and more widely used in boiler manufacture.

Features:

The heat transfer of a thread smoke tube is the same as that of 1.7 to 1.8 ordinary root pipes after optimizing heat transfer and flow resistance when used on the boiler. This can reduce the pipe numbers and lessen the diameter of the pot shell, thus saving the steel and cutting down capital.

The heat transfer surface area is 1.5 to 2.0 times the light pipe. This dramatically improves the activity of the cooling methods and strengthens the tube inside boiling and condensation transfer effects in the application of the 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.

The 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 making it cold during heating and air-conditioning engineering. In the situation with drying, heating, and other heat exchanging, its surface is handled by anodizing, which with beautiful color and luster and can effectively prevent surface corrosion.

Aluminum rolling finned tube is rolled as a whole by the aluminum tube, which has the feather that has 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 finned tube is ahead of the string or around the plate ones.

We can produce all kinds of steel strip winding finned tubes and steel aluminum composite finned tubes according to user needs.

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

Corrugated tube (expansion wave tube)

High heat transfer efficiency

The unique design of peaks and troughs makes the fluid in the expansion wave tube form strong turbulence because of the section’s continuous mutation inside and outside the pipe. Even when the flow velocity is small, the fluid inside and outside can form strong disturbances, significantly improving the heat exchange tube’s heat transfer coefficient. The heat transfer coefficient of an expansion wave tube is 2 to 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 the 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 change. Due to the coefficient of linear expansion between the dirt and bellows tube being extensive, a more significant pulled-off force between dirt and heat exchange tube will produce, so even if there is 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 vast, the pressure drop is small, and the energy-saving effect is noticeable.
Automatic compensation function

The unique structure shape makes the expansion wave tube can effectively reduce thermal stress and does 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 reducing the temperature difference stress, and can adapt to the changing of the significant temperature difference and pressure so that it can’t be leaks of tube rupture caused by the phenomenon. With a unique connection technology, the Baffle plate and bellows tube prolong the service life of the heat exchanger.

• Wound fin tube

KL-type finned tube
KL-type finned tube is also called the knurling finned tube, that is the 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:

The highest using temperature is 250 ºC or less than 250 ºC.

The highest working pressure is 3.2 MPa or less 3.2 MPa.

Characteristics and advantages:

Higher heat transfer performance and minor contact thermal resistance

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

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, increasing the thermal efficiency and ending thermal resistance brought by the non-eliminate contact from the segment gap of the string-type finned tube.

Working temperature: 230 ºC

1 Features:

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

2 Application:

LL-type finned tubes are mainly used in petrochemical, electric power, paper making, tobacco, building heating, and other industry such as air coolers, air heaters,s and air heaters of the food industry, and plant starch spray drying systems.

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 increases the thermal efficiency and puts an end to thermal resistance brought by the non-eliminate contact from the segment gap of the string-type finned tube.

Working temperature: 230 ºC

1 Features:

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

2 Application:

L-type finned tubes are mainly used in petrochemical, electric power, paper making, tobacco, building heating, and other industry such as air coolers, air heaters and air heaters of the food industry, and plant starch spray drying systems.

• 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 the winding process, the pre-tightening force is to a certain extent, so the strip will be firmly in the spiral groove to ensure a specific contact area between the steel band and the steel pipe. To prevent the strip spring from falling off the light tube, the steel strip’s two ends must be welded onto the steel pipe. There should be a specific clearance between the steel belt and the spiral groove to set quickly. If the clearance is too small, the setting process will be challenging to proceed smoothly. In addition, the steel belt of winding there will always be a certain amount of rebound, which makes it cannot a very good joint between the steel belt and spiral groove bottom. Slotting embedding technology is advanced, from stable, embedded, and firmly pulled off force not less than 70 n, the allowable temperature can reach 400 ºC and has the strong ability of temperature resistance and thermal shock, and widely used in petrochemical air coolers. Inlaid fins can be conducted on available equipment, and they cost little. McElroy companies in the United States, the company I used the advanced production equipment.

• Welded fin tube

High-frequency welding spiral fin tube

High-frequency welding spiral fin tube is a new kind of heat transfer material with wearing resistance and is 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 and steel pipe simultaneously. This technology has high thermal efficiency, large heat dissipation area, long service life, range adaptation temperature, high pressure, etc. We make it welded together as a whole.

They are widely used in waste heat recovery, the petrochemical industry, power plant boilers, economizers, 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 economical installation

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

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

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

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

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

Weldable fin form: natural tooth, tooth.

U Type-High frequency welding spiral fin tube

High-frequency welding spiral fin tube is a new kind of heat transfer material with wearing resistance and is 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 and steel pipe simultaneously. This technology has high thermal efficiency, large heat dissipation area, long service life, range adaptation temperature, high pressure, etc. We make it welded together as a whole.

They are widely used in waste heat recovery, the petrochemical industry, power plant boilers, economizers, 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 economical installation

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

2. Easy maintenance

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

3. High efficiency

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

4. Long service life

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

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

Weldable fin form: natural tooth, tooth.

Fin tubes information:

Raw tube available material: Carbon Steel, Copper, Stainless Steel, and 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 Specifications.

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