Bend welding is mainly applied to special-shaped structures such as pipe bends and sheet metal bent parts. It achieves high-strength, high-sealing and deformation-resistant metal joining through matched special welding materials and precise welding processes. 

Welding materials are dominated by low-hydrogen electrodes, solid/flux-cored wires, compatible with carbon steel, stainless steel, alloy steel, low-temperature steel and other base materials, balancing weld toughness, corrosion resistance and bending crack resistance. 

Welding technologies commonly include TIG, MIG/MAG, manual arc welding and automated welding, with strict control of heat input, interpass temperature and welding sequence to solve pain points such as stress concentration, cracking and poor forming in bending zones. It is widely used in oil and gas pipelines, pressure vessels, construction machinery, shipbuilding and other fields.