There are many kinds of Laser Welded Finned Tubes in use. In operation, high-frequency welded Finned Tubes are mainly used. Although it is more advanced in product quality and production automation compared with inlay and brazing methods, it is difficult to weld the root of high-frequency welded finned tubes and there are wrinkles at the root, resulting in many shortcomings in heat exchange efficiency and convenient ash deposition prevention. In view of the above reasons and in response to the guidelines and policies on energy conservation and emission reduction. Seamless Finned Tube Radiator Fin Tube
Technology of laser welding Finned Tube
1. The thickness of the base tube of the laser welded fin tube can be 0.8-1.5 mm, and the thickness of the fin can be 0.3-1 mm, which greatly saves the material cost compared with other processes.Seamless Finned Tube Radiator Fin Tube
2. High Penetration Rate can prevent gap corrosion, prolong service life and reduce heat transfer resistance.
3. Break through the material limit and use different materials for processing.
4. It is easy for secondary processing and can be directly used for coil and elbow.
5. The welding heat affected zone is small and the metallographic change is small, which makes the processing of small diameter finned tube possible.
The materials of heat exchange tubes and condenser Tubes should have good heat transfer performance, good corrosion resistance, erosion resistance and wear resistance, as well as good strength, rigidity and plasticity, and are easy to process and manufacture.
Laser Welded Finned Tubes can be effective to a certain extent in detecting smooth transitions at the tube junctions. The nozzle should be 100mm higher than the top of the pile, and the nozzle height of each detection tube should be consistent. The lower end of the tube should be closed and the upper end should be covered. There must be no foreign matter in the tube, and the tube body must not be damaged.
Fin Tube
Brazed Spiral Finned Tube
Brazing spiral Finned Tubes is to fill a filler metal with a melting point lower than that of the weldment between the weldments, and then heat the brazing temperature. When the weldment is not melted, the filler metal will be wetted and brazed, and the brazed joint will be formed depending on the expansion of the contact part of the weldment, thus completing the welding of spiral finned tubes.
The spiral finned tube is mainly an integral spiral finned tube that can be formed at one time after the tube is squeezed and rolled by using thick wall tubes under the condition of medium frequency continuous heating. See the current method for manufacturing Finned Tubes. The integral spiral finned tube developed by a domestic company and the self-made integral finned tube manufacturing equipment have been applied.
1; It is related to the Fin material, for example, the fin material is aluminum, and the melting point is 660 °C. Therefore, the steel-aluminum composite finned tube is not suitable for the heat exchange system of high temperature flue gas. Considering that the high-temperature flue gas has sulfur components, the finned tube radiator is made of ND steel, and the fin type adopts high-frequency spiral finned tubes.
2; and processing technology. For example, the steel-aluminum composite Finned Tube begins to manifest at 210 °C, while the contact thermal resistance curve of the ordinary finned tube around the steel sheet shows an obvious upward trend from about 150 °C.
Laser welded Finned Tubes are mainly used for civil wall hanging and industrial boilers in the process of use. Foreign technologies are mainly used for operation. Its main advantages are that the contact thermal resistance is zero, the whole equipment is welded at high frequency, the winging rate is large, the weight is light, the assembled Heat Exchanger is compact, the energy efficiency is high, and the emission requirements are met.
Q: Why buy from us instead of other suppliers?
A: Professional craftsmanship manufacturing experience, timely delivery and long-term after-sales service. High-quality products fully meet any specific requirements. We provide one-stop solution service and competitive price.
Q: Are your products customized?
A: Yes, we can customize new products according to your requirements or drawings.
Q: What's your payment terms?
A: T / T, PayPal
Q: How can you ensure the quality?
A: Before mass production, always final inspection before shipment;
Since the establishment of the company, it has been our constant pursuit and commitment to take advanced technology as the starting point, customer needs as the starting point, and satisfy customers with technology and humanized services.
The Finned Tube Heat Exchanger adopts the way of adding a finned tube heat exchanger, which greatly improves the heat dissipation performance of the radiator fins and further improves the heat dissipation effect of the radiator fins. The finned tube heat exchanger is welded by low-carbon environmentally friendly steel pipes, which is durable and has a long cooling time. Our inspection and maintenance during use are still helpful to the life of the radiator fins.
In order to improve the heat exchange efficiency, fins are usually added on the surface of the heat exchange tube to increase the outer surface area (or inner surface area) of the heat exchange tube, so as to achieve the purpose of improving the heat exchange efficiency. Such a heat exchange tube is called a finned tube. .
Finned tubes are divided into: square finned tubes, spiral finned tubes, longitudinal Finned Tubes, spiral serrated finned tubes, and inner finned tubes according to shape and structure;
The Finned Tube is divided into: single metal finned tube and bimetallic composite Finned Tube according to the material;
Finned tubes can be divided into: rolling finned tubes, Welding Finned Tubes, roll forming finned tubes, and sleeve-forming Finned Tubes according to different processing techniques.
Finned tubes offer many advantages, such as:
1. Strong heat transfer ability: Compared with the light pipe, the heat transfer area can be increased by 2-30 times, and the heat transfer coefficient can be increased by 1-2 times.
2. Compact structure: Due to the increased heat transfer area per unit volume, the heat transfer capacity is enhanced. Compared with the light tube under the same heat load, the Finned Tube Heat Exchanger has fewer tubes, and the diameter or height of the cylinder can be reduced, because the structure is compact and Easy to set up.
3. Materials can be used more effectively and rationally: not only because of the compact structure, the amount of materials is reduced, but also it is possible to flexibly select materials for heat transfer and process requirements, such as inlaid or welded Fin Tubes made of different materials;
4. When the medium is heated, compared with the bare tube, the Finned Tube wall temperature under the same heat load is reduced, which is beneficial to reduce the high temperature corrosion and over-temperature damage of the metal surface.
Regardless of whether the medium is heated or cooled, the heat transfer temperature difference is smaller than that of the bare tube, which is beneficial to reducing the scaling on the outer surface of the tube. Another important reason for fouling reduction is that finned tubes do not form circumferentially or axially like bare Tubes.
Reasons to choose us:
We are one of the finned tube manufacturers in China, and our products have sold well all over the world for many years, and have been highly appraised by customers all over the world. We have a complete service team, complete production equipment and strict quality management system to guarantee your procurement needs and transaction security in an all-round way. We guarantee that every product delivered is qualified. When you contact us to inquire about your order, we will have professional technical engineers to conduct detailed docking with you on technical issues to ensure that the products meet your needs. Our sales managers are on call 24 hours a day to ensure timely and efficient service.
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