As the scope of Tekfen, structural steels of process modules for P58, P62 and P63 FPSO Platforms to be installed at Parque das Baleias, Roncador and Papa Terra Offshore Oil Fields in Brazil, have been fabricated. In addition, fabrications of Topside Deck Panel for Submersible Platform P55 at Roncador Field have been performed. Deck segments fabricated in Ceyhan Steel Factory, have been transported to Iskenderun Port by means of special vehicles, and their assembly have been performed over there at the port. Totally, 12 process modules, of 11.000 tons in weight, have been fabricated and handed over to customer within the scheduled time. The Weight of the completed modules changes between 130 and 620 tons. Dimensions of the biggest module was; W: 29 x L: 20,8 x H: 9,2 m, and the weight was 620 tons.