Welding — one of the OSHA-defined “hot work” activities — is a major task in many industries. You’ll find it performed in manufacturing, fabrication, and repair work. In fact, anywhere two or more materials must be joined together, welding will likely be present.
The three most common types of welding procedures performed by humans include Shielded Metal Arc Welding (SMAW), Metal Inert Gas welding (MIG), and Tungsten Inert Gas welding (TIG).