welding metal pieces tube benders sheet metal bending WELDING METAL PIECES Welding is the most commonly used method of joining metal parts permanently. To procedure involves applying heat to welding metal pieces, melting and joining them to make a bond, which is permanent. The strength of welding metal pieces has made customers trust Bourgneuf industries for many industrial and commercial applications. Welding, assembling and bending are all part of Bourgneuf's pipe bending specialty.