6 pipes and tubes of metal; mountings for pipework systems, supports and hangers for pipelines and vessels in industrial plants and hangers and hanger parts, pipe attachments and pipes support attachments, namely, weld-oneye plates, weld-on lugs, weld-on brackets, clevises, weld-on clevises, tie rods, threaded rods, rod coupling, turnbuckles, threaded studs, connecting plats, constant spring hangers, constant spring supports, variable spring hangers, variable spring supports, stanchions, pipe clamps, beam clamps, u-bolts, pipe saddles, pipe shields, roller bearing, clamp bases, sliding clamp bases, spherical washers, eye-nuts, eye plates, bolts and nuts, all made of metal and use in the installation of pipes and pipework systems in plants, factories, buildings, processing systems and processing engineering