1021 15 th International Research/Expert Conference ”Trends in the Development of Machinery and Associated Technology” TMT 2011, Prague, Czech Republic, 12-18 September 2011 THE SELECTION OF THE OPTIMUM CONSTRUCTION SOLUTION FOR THE MULTI-CHAMBER TANK OF LARGE VOLUME Fadil Islamovic, Dzenana Gaco, Atif Hodzic, Esad Bajramovic, Bahrudin Hrnjica University in Bihac - Faculty of Technical Engineering Bihac dr. Irfana Ljubijankića bb, 77000 Bihac Bosnia and Herzegovina ABSTRACT In the area of Bosnia and Herzegovina there exist a significant number of oil terminals as a legacy of Federal direction of commodity reserves of the former Yugoslavia, which today is at disposal and usage to company Terminals of the Federation BH. Within those storages there is also TTT S-105 Ribic in Bihac. The paper presents an outline of the procedure selection and calculation of the general model of the multi-chamber tank of large volume, higher than 5.000[m 3 ], as a result of the reconstruction of the existing one-chamber tanks built 35 years ago, but destroyed due to war and not properly maintained in the post-war period. Keywords: one-chamber tank, reconstruction, multi-chamber tank, optimum, general model. 1. INTRODUCTION Vertical cylindrical tank of 5.000 [m 3 ] volume is built of steel S.0361, and is intended for storage of oil derivatives of specific weight – 10 [kN/m 3 ]. Internal diameter of the tank is Ø 24.384 [mm]. Height, measured from the bottom of the tank to the internal surface of the protruding arm of the boundary angle equals to 11.010 [mm]. These dimensions enable the tank to contain 5.000 [m 3 ] of useful volume. The layout of the vertical multi-chamber cylindrical tank (4 chambers) is given in Picture 1. Picture 1. Multi-chamber cylindrical tank The basic construction of the multi-chamber tank is one-chamber tank (vessel) of 5.000 [m 3 ] volume that can be sized according to the API standard. The general model of the multi-chamber vessel (4 chambers) is created by installing vertical partitions that need to be positioned in the basic model, without disturbing construction stability [1]. During the calculation of individual tank elements, the stress of tank dead weight and useful freight was used. Snow and wind were used as a total stress of 1,22 [kN/m 2 ]. The bottom of the tank has total useful surface of 466,5 [m 2 ]. It consists of sheets of 6 and 8 [mm] thickness. 8 [mm] thick sheets were placed in the peripheral area of the bottom. Plates in one strap, as well as all straps, are mutually lap welded with fillet weld.