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Information × Registration Number 0210U006912, 0110U004567 , R & D reports Title Development of advanced methods and means for expert assessment of strength and durability of materials and structural elements of pipelines systems for transportation of gaseous hydrogen and its admixtures with taking into account of operational conditions popup.stage_title Head Dmytrakh Ihor Mykolayovych, Доктор технічних наук Registration Date 23-12-2010 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 Using fracture mechanics approaches, the criteria for assessment of safe operation of pipeline with crack-like defects in hydrogenous operating environment of different composition were proposed and proved. The analytic relation for description of fatigue crack growth resistance diagram of pipeline steels in hydrogenous environments was proposed and experimentally verified. This formula takes into account the local hydrogen concentration in the crack tip and also the average hydrogen concentration in bulk of metal. On this ground the diagrams of critical dimensions of defects were calculated for pipelines of different size and different level of hydrogenation. These diagrams serve the basis for assessment of workability and durability of pipelines in given operating conditions. The version of computer's expert program for technical diagnostics of structural elements workability of pipeline systems for hydrogen transmission was developed. Product Description popup.authors Білий Орест Левкович Барна Роман Андрійович Никифорчин Григорій Миколайович Сиротюк Андрій Михайлович Студент Олександра Зіновіївна popup.nrat_date 2020-04-02 Close