Selection Of Welding Methods For Bailey Steel Bridge Production

Submerged arc automatic welding: The most commonly used and efficient method, especially suitable for long straight welds (such as the butt welds and fillet welds of chord members and longitudinal girders) and regular mass production. It can provide deep penetration, high deposition rate, stable high-quality welds, and aesthetically pleasing weld bead formation. However, it requires precise tracks and tracking systems.
CO2 gas shielded welding: Widely applied and highly flexible. It is suitable for welding in various positions (flat, horizontal, vertical, overhead), particularly for short welds, irregular welds, fillet welds, and areas that are difficult to cover with automatic welding (such as gusset plates, connection plates, stiffeners, etc.). It is highly efficient and has relatively strong rust resistance.
Manual arc welding: Mainly used for positioning welding, repair welding, short and small welds that are difficult to automate, or on-site installation welds (although production mainly takes place in factories). It offers the highest flexibility but requires the highest skill level from welders.
Selection criteria: Type of weld, position, length, production efficiency.