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Information × Registration Number 0219U003476, 0118U000477 , R & D reports Title Development of the method of an evaluation of workability and residual life time of main pipelines with in-service macrodelamination popup.stage_title Head Tsyrulnyk Oleksandr, Registration Date 21-02-2019 Organization Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine popup.description2 The stress state of pipe of gas pipeline with hydrogen induced macrodefect in the wall under mutual action of working pressure of gas in the pipe and molecular hydrogen pressure in the defect was analyzed. For the The equivalent and tangential stresses on the external surface of the pipe in a center over delamination were calculated by the method of limited integral equations for the specific parameters of the pipe geometry, working pressure of natural gas and delamination detected. They are essential what indicates for a danger of a fracture upper over macrodefect metal layer at the different mechanisms: ductile rupture of crosspieces, fatigue and corrosion-mechanical fracture. Product Description popup.authors Греділь Мирослава Іванівна Звірко Ольга Іванівна Крет Наталя Володимирівна Никифорчин Григорій Миколайович popup.nrat_date 2020-04-02 Close