The development of new methods or equipment for water purification in recent years has been an important task. Of the existing methods as promising ones, we can distinguish electrochemical non-reagent purification methods. A design of a water treatment plant has been developed, the main elements of which are a device for electrochemical treatment with electrodes made of titanium alloys and a filter for fine mechanical cleaning. This plant has passed a set of laboratory tests and testing as part of a mobile integrated water treatment plant. According to the test results, it has been found that electrodes made of titanium alloys with the highest titanium content have the best resistance to electrochemical destruction. The rational current density and the range of the gap between the electrodes are determined, which ensure effective water purification with an extended overhaul cycle and sufficiently low metal consumption and energy consumption.

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Structural elements of thin-walled vessels operating under internal pressure are mainly made from sheet blanks using welding operations. To reduce the negative impact of welds in the manufacture of thin-walled vessels, it is proposed to use separate calibration processes by compressing vessel parts with subsequent welding and their joint calibration by distribution and rotary rolling. Compression calibration ensures the accuracy of matching of the abutting annular edges of the vessel parts. During rotary rolling, the welds are simultaneously smoothed and the strength characteristics are improved due to plastic hardening caused by thinning and leveling the wall thickness of the vessel body. Based on the conducted research, technological recommendations have been developed for the manufacture of thin-walled vessels of increased strength from corrosion-resistant steels.

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Scientists from different countries are engaged in the development of new or improvement of existing water purification technologies. At the same time, not enough attention is paid to the development of equipment for water purification and technologies for their manufacture. The article presents a model of a universal filter housing for cleaning liquids from solid particles. Mechanical filters of cartridge or bag type can be used as filter elements. The main supporting element of the filter housing is a thin-walled cylindrical flask. The use of rotary rolling in the process of manufacturing a cylindrical flask makes it possible to reduce the negative effect of welded seams and increase the strength of the cylindrical shell. The results of experimental studies on assessing the effect of the relative deformation value along the wall thickness during rotary rolling of steel cylindrical shells on their strength and stability are presented.