Laser Welded Stainless Steel Finned Tube

Laser-welded stainless steel finned tubes use stainless steel as the base tube, and the fins are joined using laser welding technology. Laser welding is characterized by high precision and efficiency, which may result in better thermal conductivity and structural strength. Compared with traditional methods, laser welding reduces the heat-affected zone, resulting in higher weld quality and less likely to cause deformation or cracking. Stainless steel’s inherent corrosion and high-temperature resistance should also be considered, which extends the product’s lifespan.

The high energy density of laser welding achieves precise, deep-penetration welding, ensuring a gap-free connection between the fins and the base tube. The base tube is commonly made of stainless steels such as 304 and 316L, offering both corrosion resistance and mechanical strength. The fin material is matched to the base tube to resist thermal stress. The fins increase the surface area by 5-30 times, significantly improving heat transfer efficiency.

304 stainless steel contains 18% chromium and 8% nickel, offering resistance to atmospheric corrosion, freshwater corrosion, and weakly acidic media. It is suitable for mildly corrosive applications such as food processing and civil heat exchange. 316 stainless steel, with the addition of 2%-3% molybdenum, significantly improves its resistance to chloride ion corrosion and is suitable for applications such as chemical engineering and marine engineering. 316L stainless steel, with a carbon content of ≤0.03%, significantly reduces susceptibility to intergranular corrosion after welding, making it suitable for complex welding applications.

Advantages of Laser-Welded Stainless Steel Finned Tubes

Laser-welded stainless steel finned tubes offer a 70% lower failure rate under demanding operating conditions than traditional products, making them the preferred solution for high-temperature, corrosive environments. In a real-world application, the use of this product in a refinery’s hydrogenation reactor increased heat transfer efficiency by 37% and extended maintenance intervals from one year to five.

Weld Strength: Laser welding is a metallurgical bond with high weld strength, reaching over 85% of that of the parent metal, typically exceeding 600 MPa. This effectively resists various external forces and pressures, ensuring the structural stability of the finned tubes.

Weld Penetration: Laser welding achieves a good bond between the fins and the base tube, with high penetration and near-zero contact thermal resistance. This helps improve heat transfer efficiency and enables more efficient heat exchange through the finned tubes.

Surface Treatment: To further enhance the corrosion and oxidation resistance of finned tubes, surface treatments such as passivation and polishing are typically performed. Passivation forms a dense passive film on the stainless steel surface, enhancing its corrosion resistance. Polishing improves the surface finish of the finned tubes, reduces the adhesion of dirt and impurities, and also helps improve heat transfer efficiency.

High Corrosion Resistance: Stainless steel inherently has good corrosion resistance. Laser welding has minimal impact on the material’s metallographic structure, effectively preserving the corrosion resistance of stainless steel, effectively resisting various corrosive media and extending the service life of the equipment.

Applications of Laser-Welded Stainless Steel Finned Heat Exchange Tubes

In the Chemical Industry

The requirements for heat exchange equipment are extremely stringent. Not only must the equipment withstand harsh environments such as high temperature, high pressure, and severe corrosion, but it must also provide efficient heat transfer performance.

Laser-welded stainless steel finned heat exchange tubes, due to their excellent corrosion resistance and high heat transfer efficiency, are widely used in various heat exchangers in the chemical industry. Whether used in cooling towers, evaporators, or condensers, laser-welded stainless steel finned heat exchange tubes effectively improve equipment heat transfer efficiency, reduce energy consumption, and minimize equipment failures and repair costs caused by corrosion.

Metallurgical Industry

Production processes generate large amounts of high-temperature exhaust gases, which contain a wealth of thermal energy. Laser-welded stainless steel finned heat exchange tubes play a vital role in waste heat boilers and air preheaters in the metallurgical industry. By efficiently recovering the heat energy from these exhaust gases, they not only reduce energy waste but also provide a stable heat source for metallurgical production.

Laser-welded stainless steel finned heat exchange tubes are also used in the cooling systems of metallurgical equipment, ensuring stable operation in high-temperature environments and extending equipment life.

The power industry

is another sector with high demands on heat exchange equipment. Within the power industry, equipment such as boiler economizers and air preheaters are crucial components of power generation systems. These devices must withstand high temperatures and high pressures while also requiring efficient heat transfer performance.

Laser-welded stainless steel finned heat exchange tubes, with their excellent corrosion resistance and high heat transfer efficiency, have become an indispensable component of these devices. By using laser-welded stainless steel finned heat exchange tubes, the power industry can significantly improve power generation efficiency, reduce energy consumption, and enhance equipment stability and reliability.

Refrigeration and Air Conditioning Industry

One of the key applications of laser-welded stainless steel finned heat exchange tubes is in the refrigeration and air conditioning industry. In this industry, core components such as evaporators and condensers require efficient heat transfer to ensure the overall performance of the refrigeration system.

Laser-welded stainless steel finned heat exchange tubes significantly improve heat exchange efficiency by increasing the heat transfer area and optimizing the fluid flow path. Compared to traditional pipes, their heat transfer efficiency can be increased several times or even dozens of times. This has led to their widespread use in the refrigeration and air conditioning industry, improving overall refrigeration system performance and reducing energy consumption.