The integral spiral finned tube is a thick-walled seamless steel tube heat exchange element formed in one piece through advanced hot rolling and extrusion processes. Its core lies in the seamless integrated structure between the fins and the base tube, eliminating the need for welding or additional materials. Instead, the tube wall metal is directly formed into spirally distributed fins through plastic deformation. This innovative design not only enhances performance but also completely resolves the inherent defects of traditional finned tubes.

 

The integral spiral finned tube boasts multiple outstanding advantages. The fin root and base tube feature a smooth transition with small fillets, which greatly reduces the risk of ash accumulation, clogging, and slagging, while significantly reducing contact thermal resistance. Its heat transfer efficiency is substantially higher than that of traditional welded finned tubes. The integrally formed structure endows it with excellent mechanical properties, with pressure-bearing capacity reaching more than three times that of seamless steel tubes of the same wall thickness. It also exhibits superior wear resistance, making it particularly suitable for extreme working conditions with high ash concentration and severe wear, such as in circulating fluidized bed boilers. Furthermore, its service life is far longer than that of wound and welded finned tubes, reaching more than three times.

 

This product is mainly manufactured using hot rolling technology. After the base tube is heated to a specific temperature by medium-frequency induction heating, it is rolled into shape in one pass using circumferentially distributed rolls, allowing precise control of fin height, spacing, and shape. Currently, this technology can be applied to non-ferrous metals such as copper and aluminum, as well as steel materials. Among them, steel integral finned tubes are mainly low-finned tubes. This production process not only improves the density, yield strength, and tensile strength of the metal structure but also ensures high consistency and reliability of the products.

 

As an upgraded replacement for traditional wound and welded finned tubes, integral spiral finned tubes have been widely used in various industrial fields. In power plant boilers, their wear resistance and efficient heat exchange characteristics significantly improve system efficiency; in waste heat recovery systems, their integrated structure ensures long-term stable operation; in the petrochemical industry, their corrosion resistance meets the requirements of harsh environments; in the refrigeration and HVAC industry, their efficient heat conduction capacity optimizes energy efficiency performance.

 

According to the requirements of different application scenarios, integral spiral finned tubes can adopt various material combinations. For conventional working conditions, steel base tubes are used to ensure pressure resistance, combined with high thermal conductivity materials to enhance heat dissipation efficiency; for corrosive environments, acid and alkali-resistant special steel is selected; for fields with strict hygiene requirements such as food and medicine, all-stainless steel material is used to ensure compliance with hygiene standards.

 

Through its unique integrated design, excellent performance, and wide application adaptability, the integral spiral finned tube has become the preferred solution in the modern industrial heat exchange field, providing more efficient, reliable, and economical heat exchange services for various industries.