- Process
- MIG Welding – Gas Metal Arc Welding (GMAW)
- TIG Welding – Gas-Tungsten Arc Welding (GTAW)
- Stick Welding – Shielded Metal Arc Welding (SMAW)
- Fluxed-Cored Arc Welding (FCAW)
- Submerged Arc Welding (SAW)
- Engine-Driven
- Multi-Process
- Multi-Operator
- Air Carbon Arc Gouging
- Stud Welders
- Spot Welders