The task was set of determining the dependence of the quantitative indicator of the corrosion rate of the material of the body of the electric dehydrator on the composition of the aggressive medium, the development of measures to improve the quality of the assessment of workability and the assessment of the residual life, as well as ensuring the protection of the parts of the body of the electric dehydrator from exposure to the most aggressive working phases during operation. For research, rectangular samples were made of low-alloy steel 09G2S with dimensions of 20x20 mm and a thickness of 4 mm. To quantify corrosion wear, the samples were immersed for different times in three model media: ordinary water with different NaCl concentrations; the water, which has stood up from oil, with various concentration of NaCl; oil-water emulsion with an oil content in the water in the range from 7.7% to 95%. It was shown that the maximum corrosion wear is observed in a model medium, which is separated water with salt dissolved in it and characteristic of the lower bottom and lower zones of the electric dehydrator body.

The question is about assessing the residual life of vertical welded cylindrical tanks after carrying out their full technical diagnostics on the technical operating parameters, taking into account the combined influence of the technical condition parameters of the tank equipment of oil and gas refining industries. The authors developed a mathematical model, established diagnostic coefficients and the informational content of the indicator for each of the periods considered, determined by the expert. A methodology for assessing the residual life of vertical cylindrical tanks with the possibility of applying a measure of informational content Kullback is presented. The values that fall outside the field of the developed model are demonstrated. Conclusions are made on the appropriateness of using the developed methodology to solve the problems of predicting the residual life of vertical cylindrical tanks of oil and gas refining industries.

The task is to assess the further period of the total operating time of pipeline systems after monitoring their technical condition, depending on the generalized impact of the technical parameters of oil and gas processing equipment. Nine signs of pipeline systems were identified, and the assessment was carried out using an indicator characterizing their residual life. The authors developed a mathematical model, using calculation methods obtained diagnostic coefficients and informativeness of the sign for each of the time periods, which are determined by experts. An algorithm for estimating the residual resource of technological pipelines is proposed. Conclusions are drawn about the possibility of using the proposed algorithm to implement tasks of this type.