Laser welded finned tubes are mainly used for civil wall-hung boilers and industrial boilers in the process of use. The foreign technology is mainly used in the operation.

Its main advantages are that the contact thermal resistance is zero, and the whole equipment is high-frequency Compared with welding, it has the characteristics of large finning ratio, light weight, and compact volume of the assembled heat exchanger, which is more energy-saving and environmentally friendly, and meets emission requirements.

When laser welding finned tubes are produced, there are many types of finned tubes in China. When operating, the group is mainly based on high-frequency welded finned tubes.

Although it is related to inlays, Compared with brazing and other methods, it is better in terms of product quality and production automation, but due to factors such as the difficulty of penetration of the root of the high-frequency welded finned tube and the wrinkles at the root, the high-frequency welded finned tube has poor heat transfer efficiency and There are also many deficiencies in the convenience of anti-dust accumulation.

In view of the above reasons and in response to the guidelines and policies on energy conservation and emission reduction.

Advantages of using laser welded finned tubes

1. The thickness of the base tube can be 0.8-1.5 mm, and the thickness of its fins can be 0.3-1 mm during operation, which greatly saves the cost of materials compared with other process costs during operation.

2. The laser welding finned tube has a high welding head rate, which can prevent crevice corrosion during operation, effectively prolong the service life and reduce heat transfer resistance.

3. Laser welding of finned tubes needs to break through material limitations, and different materials should be processed during use.

4. Laser welded finned tubes are easy for secondary processing, and can be directly coiled and bent.

5. The welding heat affected zone is small and the metallographic change is small, which makes it possible to process small diameter finned tubes.

The materials used for heat exchange tubes and condenser tubes should have excellent heat transfer performance, and should have good corrosion resistance, erosion resistance, and abrasion resistance, as well as good strength, rigidity and plasticity, and be easy to process and manufacture.