The presented study discusses the structures used for restoring the bearing capacity of the main pipeline sections in case of the corrosion damage. It is shown that a welded crimping socket the most frequently used in repair can efficiently reduce stress in the pipe walls only in close joints. To increase the repair structure efficiency, it is proposed to place an elastic layer between a pipe and a socket which can fill the space and transfer a part of load from the pipe to the socket. The elastic layer material must be, first, soft enough to completely fill a gap between the pipe and the socket considering the pipe surface irregularity. Secondly, the material must be characterized by a sufficiently large elastic modulus (in the range of 1000 MPa <E <3000 MPa) to transmit the load from the pipe to the socket. Thus, the optimum elastic interlayer should be made from polymeric materials: low-pressure polyethylene, polypropylene, and polyvinylchloride.
repair of main pipelines, crimping sockets, corrosion damage, polymeric sockets, finite-element method.
Россия обладает развитой сетью трубопроводного транспорта природного газа, нефти и продуктов их переработки. Общая протяженность магистральных трубопроводов превышает 200 тыс. км.
Общая протяженность трубопроводов различного назначения в 120 странах мира составляет около 3,5 млн. км [1]. По прогнозам Межгосударственной Ассоциации природного газа Америки (INGAA), к 2035 будут дополнительно построены трубопроводы для транспортировки нефти и газа протяженностью более чем полмиллиона миль (804 тыс. км).
Магистральные и промысловые трубопроводы представляют собой технические устройства, разрушение ко-торых способно вызвать экологические катастрофы и привести к человеческим жертвам. Таким образом, монтаж, ре-монт, реконструкция и эксплуатация трубопроводов требуют особого внимания с точки зрения безопасности.
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