Client: ERDEMIR Iron Steel Factories Contractor: TOKAR Yapı ve End. Tes.San.ve Tic. A.Ş. & Nippon Sanso Consortium Sub Contractor: SETA INSAAT Scope: Turnkey project. Complete erection and commissioning of a 500 tons/day Oxygen Plant 4. Air Purification Unit civil works, approximately 1000 tons steel construction manufacturing and erection, cold box erection, machinery and equipment erection, pipe racks and pipe erection, electrical and instrument installation.