Submerged arc welding is an arc welding process that uses an arc or arcs between a flux covered bare metal electrode(s) and the weld pool. The arc and molten metal are shielded by a blanket of granular flux, supplied through the welding nozzle from a hopper.
The process is used without pressure and filler metal from the electrode and sometimes from a supplemental source (welding rod, flux, or metal granules).
SAW can be applied in three different modes: semiautomatic, automatic, and machine. It can utilize either a CV or CC power supply. SAW is used extensively in shop pressure vessel fabrication and pipe manufacturing.
- Very High Deposition rates
- High and consistent quality
- High current and 100% duty cycle
- The weld is hidden by flux making it harder to control
- Equipment is costly and not very portable
- Limited to shop work in the flat position