Irons and steels; metal pipes and tubes; steel pipes and tubes; stainless steel pipes; metal pipe couplings and joints; steel pipe couplings and joints; * metal * connection devices for steel tubes, namely, steel threaded tubes and steel threaded connection devices for steel tubes in particular for tubes used in the oil and gas industry; Steel pipe threaded couplings for connecting steel tubes in particular tubes used in the oil and gas industry; flanges of metal