Laser Welded Finned Tube

Section 1: Laser Welded Fin Tube Description:

Laser-welded finned tubes are a new type of heat exchange material in the finned tube welding industry, known for their durability and efficiency. They are high-efficiency energy-saving heat exchange elements featuring high heat exchange efficiency, large heat dissipation area, long service life, wide temperature range adaptability, high pressure resistance, and compliance with national energy-saving and environmental protection emission standards.

Laser-welded finned tubes are extensively used in chemical, power, air conditioning, petrochemical, and refrigeration engineering, such as surface air coolers, air heaters, and fan coils in air conditioning projects. The equipment is also used in refrigeration engineering, including evaporators for cold air blowers and frost-free refrigerators.

Laser-welded finned tubes are not only suitable for the flow of single-phase fluids during use, but their equipment also holds significant value for phase change heat transfer. Most finned tube heat exchangers for clean gases utilize a new, high-efficiency fin surface structure, achieving remarkable heat transfer enhancement effects.

Laser-welded finned tubes, compared to other processes, significantly reduce material costs while achieving high welding penetration rates. They effectively prevent corrosion of gaps during use, thereby extending the service life of the equipment to a certain extent and reducing the thermal resistance in heat transfer.

Laser-welded finned tubes undergo rigorous quality control during production. The equipment primarily utilizes a CCD monitoring system to continuously oversee the welding area, ensuring first-piece approval. A metallographic analysis system is employed to determine the welding status, guaranteeing product quality before proceeding with mass production.

II. Five Key Features of Laser Welded Finned Tubes:

1. Base tube thickness ranges from 0.5 to 5mm, fin thickness from 0.28 to 1.0mm, significantly reducing material costs compared to other processes. The unique winding technique ensures fin spacing as small as 2.0mm or less, with even distribution and a flat bottom without creases, preventing dust accumulation and enhancing heat exchange efficiency. It is more energy-efficient by over 30% than high-frequency welded fin tubes of the same specification.

High penetration rate, preventing gap corrosion, extending service life, and reducing thermal resistance in heat transfer.

3. Overcome material limitations; processing can be done with various materials.

4. Easy for secondary processing, can be directly coiled and bent.

5. The small heat-affected zone in welding and minimal metallurgical changes make it possible to process small-diameter finned tubes.

6. High level of automation; fully automatic fin laser welding machine completes welding in one go, with simultaneous winding for deep fusion between the fin base and the tube. 100% welding between fins and tubes without the use of filler material. As laser welding is carried out under a protective atmosphere, there are no impurities on the weld seam.