The Spiral Finned Tube is very simple and economical in the process of installation. Its equipment length can reach 6 meters, reducing the connection points, making the installation more economical and fast, and reducing the probability of water leakage at the connection. The maintenance is simple. After the installation of high-frequency welding spiral Finned Tube , the maintenance is basically unnecessary.
The spiral finned tube has High Efficiency. Its heat dissipation area is more than 8 times that of the smooth tube when it is used. During the operation, its interior will be more smooth, its internal water flow resistance is small, and its service life is long when it is operated. The mechanical strength of the finned tube is high, and the tensile strength is more than 200Mpa. The inside and outside of the tube are all hot-dip galvanized. Material of weldable fins: carbon steel, corrosion-resistant steel, Stainless steel, alloy steel. Form of weldable fins: solid teeth, open teeth.
Spiral Finned Tubes can be manufactured by various methods in the process of manufacturing. At present, finned tubes used in heat exchange equipment such as boilers and pressure vessels mainly have the following manufacturing methods:
High frequency resistance welding spiral finned tube
High frequency resistance welding of spiral finned tube is to introduce high power high-frequency current into the weldment, use the resistance heat generated by the current passing through the contact surface of the weldment joint and the adjacent area to make the welding contact surface reach the molten or semi molten plastic state, and then apply appropriate pressure to the welding contact surface to complete the welding of finned tube.
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.
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.
When laser welded finned tubes are manufactured, there are many kinds of finned tubes in China. If high-frequency welding finned tubes are mainly used during operation, it has more advantages in product quality and production automation than inlaying, brazing and other methods. However, because the root of high-frequency welded finned tubes is difficult to penetrate and there are wrinkles at the root, there are many shortcomings in the heat exchange efficiency and preventing gray accumulation of high-frequency welded finned tubes. In view of the above reasons, there are policies for energy conservation and emission reduction.
Benefits of using laser to weld finned tubes
1. The thickness of the base tube can be 0.8-1.5mm, and the thickness of the pin in operation can be 0.3-1mm. Compared with other process costs during operation, the material cost can be greatly reduced.
2. The Laser Welded Finned Tube has a high welding joint ratio, which can prevent the corrosion in the working time gap, effectively extend the service life and reduce the heat conduction resistance.
3. When laser welding fin tube breaks through the material limit, other materials shall be used for processing.
4. The laser Welded Finned Tube is easy to be processed for the second time, and the coil and elbow can be directly processed.
5. The welding heat affected zone is small and the metallographic change is small, so it is allowed to process small diameter finned tubes.
Rematerials of heat exchange tubes and condensation tubes shall have heat transfer performance, corrosion resistance, corrosion resistance, wear resistance, strong strength, strong plasticity and easy processing.
Q: Why buy from us instead of from other suppliers?
A: professional experience in process manufacturing, timely delivery and long-term after-sales service. High quality products fully meet any specific requirements. We provide one-stop solution services and competitive prices.
Q: Are your products customized?
A: Yes, we can customize new products according to your requirements or drawings.
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Q: how to ensure quality?
A: before mass production, the final inspection is always carried out before shipment;
Since the establishment of the company, it is our constant pursuit and commitment to meet our customers with science and technology and humanized services based on advanced science and technology as the starting point and the needs of customers.
Finned Tube Heat Exchanger adopts the method of adding finned tube heat exchanger, which greatly improves the heat emission of radiator fins and further improves the role of heat emission of radiator fins. The finned tube heat exchanger is welded with low-carbon environment-friendly steel pipes, which is durable and emits heat for a long time. Our inspection and maintenance during use are still helpful to the service life of radiator fins.
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.
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.
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 condensing tubes shall have heat transfer performance, good corrosion resistance, erosion resistance and abrasion resistance, and good strength, rigidity and plasticity, which are easy to process and manufacture.
Laser welded finned tubes can effectively detect the smooth transition of the tube connection to a certain extent. The nozzle shall be more than 100mm higher than the pile top, and the nozzle height of each detection tube shall be consistent. The lower end of the tube shall be closed and the upper end shall be covered. There shall be no foreign matters in the tube and the tube body shall not be damaged.
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