Tubes made of stainless steels or of special steels, especially ultrasound-controlled and brilliant annealed tubes, tubes made of ferritic stainless steel and/or super ferritic stainless steel and/or austenitic stainless steel and/or super austenitic stainless steel and/or austeno-ferritic stainless steel and/or super austeno-ferritic stainless steel; tubes made of stainless steels or of special steels for heat exchangers, condensers, heating power stations, nuclear power stations, desaliniza...