Welded rectangular duct refers to a ventilation duct with a rectangular cross-section formed by connecting steel plates or other metal sheets through welding technology. It has the following characteristics:
Sturdy structure: Welded connections give the air duct high strength and rigidity, capable of withstanding large wind pressures and loads.
Good sealing: The welded joints are tight, reducing the possibility of air leakage and improving the efficiency of the ventilation system.
Strong adaptability: Different sizes and specifications of air ducts can be customized according to actual needs to meet the needs of various ventilation systems.
Beautiful and elegant: The welded rectangular duct has a neat and beautiful appearance, which meets the aesthetic requirements of modern architecture.

The commonly used materials for welding rectangular air ducts include carbon steel, stainless steel, galvanized steel plates, etc. Among them, stainless steel air ducts have good corrosion resistance and aesthetic properties, making them suitable for places with high air quality requirements; Carbon steel air ducts have lower costs and are suitable for general industrial sites; Galvanized steel sheet air ducts combine the advantages of carbon steel and galvanized layer, which is both economical and has a certain degree of corrosion resistance.

The welding process for rectangular ducts mainly includes the following:
Electric arc welding: using the heat generated by the arc to melt the welding rod and base material, forming a weld seam. Arc welding has the advantages of fast welding speed and good weld quality, and is suitable for welding thicker steel plates.
Argon arc welding: using argon gas as a protective gas to prevent oxidation of the weld seam, suitable for welding easily oxidizable metals such as stainless steel.
Gas welding: welding using the heat generated by the combustion of combustible gases and oxygen, suitable for welding thinner steel plates.

Welded rectangular ducts are applied in various fields such as construction, industry, shipbuilding, hardware, steel structure engineering, etc. In the field of architecture, it is mainly used in ventilation and air conditioning systems to achieve air circulation and temperature regulation; In the industrial field, it is used to transport various gases and dust, ensuring a clean and safe production environment.