NIBULON continues building floating crane of Project P-140
Presently, the maximum number of shipbuilders is involved in building NIBULON MAX. NIBULON says the employees have several work shifts and conduct construction in all directions simultaneously.
The construction of the P-140 project vessel, the largest one in NIBULON’s fleet and the shipyard’s pride among all its achievements, demonstrates not only an absolutely new and higher level of the shipyard’s capacities but also skills and experience of the shipbuilders, the real workmen, who build Ukrainian modern fleet.
Presently, the maximum number of shipbuilders is involved in building NIBULON MAX. The employees have several work shifts and perform construction in all directions simultaneously. The shipbuilders are actively insulating spaces, laying cables, installing all the required outfitting and pipelines, as well as conducting painting works. At the same time, the specialists are producing 30-ton hatch covers for two holds. The parts for their moveable joints are more than 4 tons.
At the same time, the welders have already welded Liebherr crane barbettes - the foundations of 12 tons each welded to the pillars. The accuracy of the mounting flange flatness when welding a barbette mustn’t exceed 0.39 mm. Consequently, KODA (Kharkiv) specialists provided a constant geometry control with the help of modern equipment.
“The crane pillar consists of the rings with a metal thickness of 50 mm. In order to weld this 50 mm to obtain the required strength, it is necessary to make 72 welding seams, i.e. a welder must go around the crane’s pillar (diameter - 3.5 m) 72 times. The total weld length of two pillars is about 10 km. About 10 best certified shipbuilders worked in two shifts to make this operation. Ultrasound checks all the welding works for integrity. In case if the smallest defect is found, the welding (72 welding seams) will be conducted from the very beginning. The task is very complicated and responsible”, notes Deputy Director of Production at the shipyard Volodymyr Zhmur.
The bore process of joint loops in hatch covers and the bore of hydraulic cylinder eye-bolts require absolute accuracy. As it is a large hull structure, it is impossible to place it at all machines. This makes the process complicated, taking into account that the bore accuracy comprises 0.3 mm. The company’s production engineers had to make a special device in order to conduct things with the highest accuracy, so that the covers might operate correctly. Chornomorskyi Shipbuilding Yard was used to operate these machines earlier. They don’t operate now.