One of the most effective ways to obtain products with the required performance characteristics is the cold plastic deformation of porous workpieces. The relevance of the subject under study is due to the need to increase the reliability of the stress-strain state assessment during the plastic processing of porous workpieces by clarifying the porosity functions. The purpose of the study is to develop a method for describing the mechanical characteristics of porous bodies by single functions, the nature of which is determined by the properties of the base material and does not depend on the initial porosity. Analytical, numerical, experimental, and computational methods using modern specialised software systems were used to examine the processes of plastic deformation. The study presents a method for describing the mechanical characteristics of porous bodies with single functions. A set of interrelated methods and techniques is based on the basic provisions of the mechanics of plastic deformation of porous bodies and allows obtaining reliable porosity functions for this material, by clarifying theoretical dependencies by experimental studies. Therewith, experimental data were obtained in experiments on axisymmetric upsetting of cylindrical samples without friction at the ends. Based on the conducted theoretical studies, porosity functions for iron-based materials are obtained. Samples of five different initial porosities were used for the study. As a result of processing experimental data, final expressions for the porosity functions of the iron-based powder workpiece material are obtained. The study also presents a method for calculating the accumulated deformation of the base material. Flow curves for iron-based powder materials are plotted. The obtained results will allow formulating the practical recommendations for the development of technological processes for the plastic processing of powder materials by pressure to obtain products with specified physical and mechanical properties

<p class="0abstract">This paper describes the comparative analysis of nozzles efficiency in high pressure water vapor systems based on different operating time and quality of their work. These nozzles described the size of water droplet and convert it into moisture. Which help to manage the room temperature. Literature survey revealed an insufficient number of studies in the field of stability and reliability of nozzles.As, it is the strong candidate in performance of the humidifiers.The purpose of this work is to test and complement the results of the received theoretical provisions, the establishment of values of the rational time of operation of the nozzles. The action plan includes laboratory and industrial tests. The main parameters focused here, were the contamination of the nozzle filters at their different operating times, the performance of the nozzles with variable operating time, as well as the nozzle spray torch, and most importantly the quality of the injector.The cone shaped nozzle was used to test the effectiveness of the spray by assuming that the water torch is coming from the nozzle. Weight method was used to estimate the degree of contamination in filters. In this study, it was found that nozzle filters increase their weight by more than 45% when operating for more than 1,500 hours, which reduces their throughput and, as a result, reduces the performance of the injectors by more than 20%. In this case, the spray torch does not cover the required area, which leads to deterioration of the system and the appearance of micro-drafts. Experimental studies have shown the need for maintenance of injectors within 1200-1300 hours of operation. Moreover, the increase in contamination of the filter effects the performance of the filter. And the stability of the diameter of the torque torch explained by critical clamping of the nozzle filter.<strong></strong></p>