Welders use hand-weld­ing or flame-cut­ting equip­ment to weld or join metal com­ponents or to fill holes, indenta­tions, or seams of fabri­cated metal products. The pro­cess of weld­ing uses either electri­city or vari­ous gasses to create high tempera­tures that bond metals. Welders may also be re­quired to flame cut or cold cut metal based on blue­prints and/or iso­metric draw­ings to con­struct new pipe or struc­tural steel systems for process systems and unit infra­structure com­ponents. Flame cutting may also be required for equip­ment demo prior to new construc­tion of new equip­ment.