Design of an MGO Storage Tank System (20,000 MT) at Thilafushi, Male

In Maldives, the demand for Marine Gas Oil (MGO) are on the increase due to expansion of number of vessels on voyage and the need for reliable and safe storage facilities designed as per API 650 is on more consideration .It has found that traditional design and development of these facilities to augment the existing utilities has led to some off sets with the API 650 In this work attempt has been made to design a storage tank farm of holding a 5000 x4 MT of MGO in a single dikes enclosure that has been appropriately designed in line with the codes and standard. Material selection was done with the requirements of the recent editions of API 650, ASME B&PV Code, ASTM etc. and some adequate design method has been chosen in line with the structural stability aspect. Since one tank is having capacity of 5000MT, the 20,000MT of MGO storage utility has been designed including loading/unloading piping section as well. It was found that, the nominal diameter is 21 m without space constraint, height is 18 m, number of course is 10, and height of each course is 1.8m. Also, the thickness of each course of tank shell is in the order of 14mm, to 6mm starting from bottom. The bottom and annular plate thickness are 10mm. Carbon steel A36M/A36 material was selected for the design. The overall weight of the tank is 6055 MT, which is found to be stable with an anchorage. The structural stability was followed by the ASCE 7-02 and related studies. Fuel loading and offloading through pump house and a Conventional Buoy Moring (CBM) Station has also given in the layout. The Civil foundation was not covered in this publication with the stability checks. Finally, the Control and Instrumentation aspect has also presented in the P&ID of the system under consideration. Therefore, this attempt is an integration of basic aspects of tank farm.