Laser Welded Finned Tube for Boiler
Laser welded finned tube for boiler is a high-efficiency heat exchange element. The fins and base tubes are firmly connected by laser welding technology. It is suitable for high temperature, high pressure, dusty flue gas environment such as boilers. Its core features include high temperature resistance, corrosion resistance, dust accumulation resistance and flow field optimization.
What is Laser welded finned tube for boiler?
Laser welded finned tube is a heat exchange tube that firmly connects the fins and base tubes by laser welding technology. This structure not only increases the heat exchange area, but also improves the heat exchange efficiency. When the fluid flows in the tube, the heat is transferred to the fins through heat conduction between the fins and the tube wall, and then dissipated by the fins to the surrounding environment. Laser welding technology ensures a close connection between the fins and the base tube, reduces thermal resistance, and improves heat exchange efficiency.
Laser welded finned tubes for boilers Manufacturing process
The manufacturing process of laser welded finned tubes includes raw material preparation, cutting and blanking, forming, cleaning, pretreatment, equipment debugging, clamping and positioning, welding operation, appearance inspection, dimension measurement, weld detection, performance testing, cleaning and anti-corrosion treatment.
In the raw material preparation stage, high-quality materials such as stainless steel or carbon steel are selected as base tubes, and fin materials are selected according to factors such as thermal conductivity and cost. During the welding operation, the laser beam is focused on the joint between the base tube and the fin, so that the local metal melts to form a molten pool, and a firm connection is achieved after cooling and solidification.
Laser welded finned tubes for boilers Application scenarios and advantages
Laser welded finned tubes for boilers are particularly suitable for high temperature, high pressure, and dusty flue gas environments. Its high temperature resistant design uses stainless steel materials with a temperature resistance of more than 800℃, and its corrosion resistant design uses stainless steel materials that are resistant to flue gas corrosion.
Laser welding technology has the advantages of small heat affected zone and fast welding speed, which makes the weld quality good, high strength and strong corrosion resistance. In addition, the fins adopt a serrated or corrugated structure to reduce ash accumulation and optimize the flow field, which is suitable for environments with different flue gas flow rates.
Advantages of laser welded fin tubes for boilers
Laser welded fin tubes are designed with 304/310S stainless steel base tubes + corrugated fins, which are resistant to 800℃ high temperature and flue gas corrosion. Zero shedding is achieved through laser welding, and the ash accumulation is reduced by 40%, which significantly improves the thermal efficiency and life of the boiler.
Laser welded fin tubes for boilers are high-efficiency heat exchange elements designed for high temperature, high pressure, and dusty flue gas environments of boilers. The stainless steel fins and base tubes are metallurgically combined through laser welding technology, which significantly improves the thermal efficiency of the boiler and extends the life of the equipment.
Features of laser welded fin tubes for boilers
1. High temperature resistant and corrosion resistant design
Material selection:
The base tubes are commonly made of 304/310S stainless steel (temperature resistant to 800℃+) and 2205 duplex stainless steel (smoke corrosion resistant);
The fins are made of 0.5~1mm thick stainless steel strips, and the surface can be coated with an anti-oxidation coating (such as CrN coating).
Advantages of laser welded fin tube welding process for boilers:
The heat affected zone of laser welding is small, and the base tube still maintains mechanical properties in high temperature flue gas (such as the exhaust temperature of power station boilers 300~500℃), avoiding the traditional brazed fins from falling off due to the melting of the brazing material.
2. Anti-ash accumulation and flow field optimization
Fin structure:
Using serrated/corrugated fins (tooth pitch 2~5mm), using flue gas turbulence to disperse ash particles, the amount of ash accumulation is reduced by 40% compared with straight fins;
Fin spacing can be customized (5~15mm) to adapt to different flue gas flow rates of boilers (10~25m/s).
Surface treatment:
Surface roughness Ra≤3.2μm after laser welding, low ash particle adhesion, and the frequency of manual cleaning can be reduced with a soot blower.