The issues of maintenance optimizing of concentrated objects (crane nodes, transitions) on the linear part of the main gas pipeline and the complex gas transportation system have been considered. It has been shown that the concentrated elements on the linear part of the gas pipeline require increased attention in the process of maintenance due to the fact that these are, as a rule, functional and controlled elements, the cost of which is higher compared to the pipeline. They are characterized mainly by hidden failures, which carry a significant potential environmental hazard and lead to economic overspending on gas transportation. The task of choosing rational strategies for control and recovery measures on the elements of the linear part, evaluating their effectiveness, and planning maintenance of the linear part with concentrated objects to achieve optimal results is set. This problem is solved based on the theory of complex systems maintenance using graph construction. Expanding the concept of an element (concentrated object) failure of the linear part by introducing hidden and functional failures leads to a significant cancellation of the reliability function, which is the basis of the uninterrupted supply of natural gas to consumers and compliance with the environmental safety of the gas transportation system. Determining the optimal periodicity of control and restoration measures is reduced to a standard extreme problem, the solution of which corresponds to the minimum value of the objective function formed based on the specific costs of gas transportation, taking into account its losses due to hidden failures and its draining during the repair work. As a result, a method of optimizing the maintenance of concentrated objects in a complex with the linear part of the gas pipeline is proposed
Received 02.03.2022
Revised 30.05.2022
Accepted 31.08.2022
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