Laser welded fin tubes and high-frequency welded fin tubes are two types of fin tubes widely used in the field of heat exchange. They have significant differences in manufacturing process, performance characteristics, application scenarios, etc.
1. Different manufacturing processes
Laser welded fin tubes use high-energy laser beams as heat sources to weld the fins and the tube body together through precise laser welding technology. During the welding process, the high temperature generated by the laser beam instantly melts the contact surface between the fins and the tube body, and then forms a strong weld during the solidification of the molten pool.
High-frequency welded fin tubes generate induced currents through high-frequency currents through the workpiece, causing the workpiece to be locally heated to a molten state, and then welded under pressure.
2. Different characteristics
Laser welded fin tubes have the advantages of high energy density, small heat-affected zone, and fast welding speed. Therefore, laser welded fin tubes have the characteristics of good weld quality, high strength, and strong corrosion resistance.
The laser welding technology of laser welded fin tubes can accurately control welding parameters, ensure stable and reliable weld quality, and reduce the emission of smoke and harmful gases, with little impact on the environment.
The high-frequency welded fin tube welding method has fast speed, small contact thermal resistance, small wrinkles, and is not easy to accumulate dust. It can also be used for welding carbon steel and stainless steel. The manufacturing process of high-frequency welded fin tubes is relatively simple, with high production efficiency and relatively low cost.
Compared with laser welding, the heat-affected zone of high-frequency welding is larger, the appearance of the weld may not be as delicate as that of laser welding, and may be slightly insufficient under certain extreme conditions.
3. Different performance characteristics
Laser welded fin tubes have high strength and corrosion resistance due to the use of high-precision laser welding technology, high weld quality, and small heat-affected zone. This enables laser welded fin tubes to exhibit better stability and durability in high temperature, high pressure and corrosive environments. In addition, there is no need to add filler materials such as welding wire during laser welding, which reduces production costs and improves production efficiency. Due to the good quality of the weld, the heat exchange efficiency of laser welded fin tubes is often better than that of high-frequency welded fin tubes, reducing heat loss and fluid resistance.
Although high-frequency welded fin tubes can also meet the use requirements under general working conditions, they may be slightly inferior to laser welded fin tubes in terms of heat exchange efficiency, corrosion resistance and durability.
High-frequency welded fin tubes also have their unique advantages. For example, high-frequency welded fin tubes have a simple manufacturing process, high production efficiency and relatively low cost, so they are more competitive in some occasions with certain cost requirements.
In addition, high-frequency welded fin tubes have good dry and wet performance and corrosion resistance, can cope with wet and dry working conditions, and are not easy to rust. High-frequency welded fin tubes also have a lightweight design and compact structure, which is easy to install and transport, and can achieve a large amount of heat transfer area in a limited space, improving the effect of heat exchange.
4. Different application scenarios
Laser welded fin tubes and high-frequency welded fin tubes also have their own focuses.
Due to their excellent performance and stability, laser welded fin tubes are more suitable for application scenarios that require high efficiency, high stability and long life. For example, in heating systems, waste heat recovery, chemical plants and various industrial boilers, laser welded fin tubes can play a more efficient and environmentally friendly role. In addition, in some occasions with extremely high requirements for weld quality, such as aerospace, medical equipment and other fields, laser welded fin tubes are also more advantageous.
High-frequency welded fin tubes are more suitable for applications under general working conditions. For example, in agriculture, industry and greenhouses, high-frequency welded fin tubes have been widely used for their advantages such as efficient heat transfer and low cost. In addition, in some occasions with certain cost requirements, such as small heat exchangers, cooling towers and other equipment, high-frequency welded fin tubes are also more competitive.