Welding is used to join beams when constructing buildings, bridges, and other structures, and pipes in pipelines, nuclear power plants and refineries. Welders use all types of welding equipment in a variety of positions, such as flat, vertical, horizontal, and overhead. They may perform manual welding, in which the work is entirely controlled by the welder, or semi-automatic welding, in which the welder uses machinery, such as a wire feeder, to help perform welding tasks. They generally plan work from drawings or specifications, or by analyzing damaged metal parts, using their knowledge of welding and metals. They select and set up welding equipment and examine welds to insure they meet standards or specifications.
Some welders have more limited duties.
They perform routine production work that has already been planned and laid out. These jobs do not require knowledge of all welding techniques. In this process, a machine performs the welding tasks while monitored by a welding machine operator. Welding machine operators set up and operate welding machines as specified by layouts, work orders, or blueprints. Operators must constantly monitor the machine to ensure that it produces the desired weld.