The work solved the problem of resource assignment to the safe operation of capacitive devices after carrying out technical diagnostics on permissible technical parameters, depending on the combined effect of the parameters of the technical condition of the equipment oil and gas refining and petrochemical industries. 10 technical and technological parameters of capacitive devices were selected, and the evaluation was carried out using such an indicator as the residual service life of capacitive devices. The authors developed a mathematical model, calculated diagnostic coefficients and informative value of the indicator for each period adopted by the expert. An algorithm for estimating the residual service life of capacitive devices based on the measure of information content of Kulbak is proposed. The estimates of the residual life, which are out of the constructed model, are shown. Conclusions about the rationality of the proposed algorithm for solving problems of this type are made.

The task is to estimate the period of technological pipelines safe operation depending on the total influence of oil refining equipment technical parameters. 9 feature properties of technological pipelines were singled out, and the estimation was made with the help of such indicator as the residual life of pipelines. The authors constructed a mathematical model, calculated the diagnostic coefficients and informative character of the characteristic for each period accepted by the expert. A mechanism for estimating the safe operational lifetime of pipeline systems is proposed. Conclusions were drawn about the advisability of applying the proposed method for solving this class of problems.

Heat-resistance (scale resistance) is the steel corrosion fastness in dry gas at high temperatures. At the temperatures over 570 °С, the ferrous alloys oxidize, as ferric oxide (wustite) with simple cubic lattice appears on the metal surface. Such oxide lacks oxygen atoms (omission solid solution) and does not interfere with the diffusion between metal and oxygen. As a result of this process the brittle oxide-scale develops and the loss of metal increases. In order to increase the heat-resistance of steel, different alloying elements are included into its composition, forming oxides with the tight structure of crystal lattice. In this paper we’ve investigated the heat-resistance of some structural steels and analyzed their corrosion resistance in the high temperature aggressive environments of chemical productions.

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Ensuring reliable operation of heat exchange equipment is the key to continuous and efficient operation of the entire technological unit or assembly as a whole. During installation, repair or operation, various deviations of the construction elements of the heat exchangers from the values specified by the project are possible. One of the possible scenarios of such deviations is the deviation of the transverse baffles of the tube bundle from the vertical design position during installation. Since the transverse baffles in the tube bundle play the role of supporting constructions, when they deviate from the vertical design position and at the same time are exposed to operational loads, it is possible to form zones of concentration of increased stresses in the heat transfer pipes, and then the occurrence of defects in these zones. Currently, the work on modeling heat-exchange equipment using specialized software systems for assessing the stress-deformed state taking into account the influencing factors and identifying the most unfavorable zones with maximum effective stresses is relevant. This paper investigates the interconnection between the magnitude and direction of deviation of the transverse baffles from the vertical design position on the stress-deformed state of the tube bundle of the heat exchanger with fixed tube grids along the rows of heat transfer tubes.

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The article sets the task of developing a method for increasing the overhaul period during operation of laminate heat exchangers. To solve this problem, the use of a thermoelectric module is proposed. The article presents experimental studies of the nature of heat transfer between two streams in a laboratory setup simulating a process on a plate heat exchanger. The experimentally substantiated dependences of the deposition value on the thermopower voltage indicators are obtained. Based on the obtained dependences, the possibility of developing a program for maintenance and repair of laminate heat exchangers is shown.

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