The craft of welding is the joining of material, usually metals, to produce finished produces like long pipes, beams and even ships.

Welders join together metals by melting and liquefying the sections to be joined with heat. These sections are united while liquefied. Once solidified, a strong bond has formed, uniting the separate pieces. Knowledge of different processes, the characteristics of metals and safety procedures are all extremely important for the skilled welder.

There are several different types of welding, depending on the energy source. Examples include gas, electric arc, laser and ultrasound welding. Welding can also be done in many different locations including under water and in outer space!