Abstract
The paper analyzes the operation status of steel pipelines. Existing methods of estimation of residual life, the durability of steel oil pipelines are considered. The purpose of the work is to develop dependencies for estimating the residual life of steel pipelines under the conditions of the corrosive environment with the observance of the requirements of safe operation. Based on the mathematical model of the electrochemical corrosion of the pipeline, in the crack of the insulation coating, under the action of an aggressive electrolytic medium with respect to the metal of the pipeline, dependence was obtained and investigated, which allows calculating the residual depth of corrosion of the pipeline wall during the operation of macro galvanic corrosion pairs under conditions of finding the aggressive solution in the damaged zone. The advantage of this model is the ability to predict the development of corrosion over time, regardless of the chemical composition of the aggressive electrolyte, as well as the ability to obtain the required calculation parameters on structures used. The developed dependence of the estimation of the residual depth of corrosion of the section of the pipeline-trench allows to rationally plan the repair works, to forecast the real terms of construction, to review the mode of operation, etc. The results obtained allow us to reliably estimate the load-bearing capacity of structures working under the conditions of an aggressive crack environment.
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Stepova, O., Rassoha, I., Blazhko, L., Hanoshenko, O. (2020). Calculation of Lifetime of Steel Oil Pipelines with the Account of Corrosive Environment Affect. In: Onyshchenko, V., Mammadova, G., Sivitska, S., Gasimov, A. (eds) Proceedings of the 2nd International Conference on Building Innovations. ICBI 2019. Lecture Notes in Civil Engineering, vol 73. Springer, Cham. https://doi.org/10.1007/978-3-030-42939-3_71
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