Within capabilities, selecting equipment and plan guying layouts, assembly, and welding, applying knowledge of geometry, physical properties of metal, weld shrinkage and welding techniques The tasks listed under the heading of Responsibilities are examples of the variety and general nature of duties performed by employees in this position. Within capabilities, bolting, clamping and welding together metal components of products such as piping systems, plate, pipe and tube or structural shapes, using arc and arc gas welding equipment.