Boilermakers are highly skilled in making and repairing all types of fabricated metal products. They make and repair vessels or containers which hold liquids and gases that create steam, and are able to withstand the pressure that builds inside. One such vessel is a boiler, which supplies steam to drive huge turbines in electric power plants and to provide heat and power in buildings, factories, ships and submarines. Before repairing or making a fabricated metal product, a boilermaker studies design drawings and creates full size patterns or templates. After the various sized and shaped pieces are marked out on metal, it's time to cut, using hand tools, flame cutting torches or a guillotine. The sections of metal are then shaped or bent and accurately lined up, before they are welded together.