Portal partners
Portal partners
First attempts to leak oil terminal tanks in Gdańsk
The expansion of the Oil Terminal in Gdańsk, a project belonging to the Mega-investment of PERN, enters a major stage. On completion there are works on the steel structure of three tanks: 170, 175, 180, each with a capacity of 100 thousand.m3 . The hydrostatic test of the first 190 tank, with a capacity of 45 thousand m3, was also completed.
The hydrostatic test of the tank shall be carried out under mandatory technical tests. During its duration, the strength, tightness and deformation of the steel structure and the settling of the foundation of the tank under full load shall be checked.
During the test, the coat and cover shall be filled simultaneously, allowing even load of the foundations, the settling of which is measured and analysed throughout the test. The uniformity of settling is particularly important in the case of a tank with a floating roof, as it prevents the deformation of the tank's mantle, which could cause wedgeling of the floating roof.
The hydrostatic tank currently tested with a capacity of 45 thousand m3 has an internal coat of 50 m diameter and a height of 24.6 m. The outer coat, also called the cover, has a diameter of 54 m and a height of 21 m.
Due to very difficult ground conditions, the foundation of the tank on TNG is composed of an indirect and direct foundation. The intermediate foundation of the 45 thousand m3 tank is a system of 455 concrete stakes with a diameter of 40 cm and a length of 21-24 m, which transfer the load from the foundation directly to the ground support layer located at a depth of about 19 m below the ground level. The direct foundation is made in the form of a double reinforced concrete ring on which the coat and tank cover are planted. The inner part of the direct foundation is a transport layer made in the form of a concentrated sand and gravel powder supporting the bottom of the tank.
Phase II of the expansion of the Oil Terminal, which is part of the PERN Megainvestment programme, assumes the creation of five oil storage tanks: three with a capacity of 100 thousand m3 each and two with a capacity of 45 thousand m3 each. This will increase storage capacity, as well as the possibility of separating different oil species delivered by sea to Naftoport.
Tanks No 170, 175, 180 and 190 will be commissioned in October of this year. The 185 tank with a capacity of 45,000 m3 will be included in the existing infrastructure in August 2021 due to the need to remove the obstacle encountered at a depth of 4 to 10 metres.
Source: PERN
