The article offers an environmentally friendly method to assemble pipes into section in order to build, to reconstruct or to fully repair pipelines both in urban communities and outside them eliminating load-carrying devices. The technique is realized with a specially designed assembly line (DAL) consisting of similar devices positioned along one line. The proposed assembly line is executed as multi-functional since the complete range of production processes can be performed with it, starting from unloading pipe sections to laying a ready section into a trench or onto an elevated pipe pier. The offered engineering solution can be used in all places. 3-D spatial models are presented in the article for illustrative purposes.

Keywords: environmentally friendly method, assembly works, pipeline, pipeline assembly, lifting equipment, engineering process

The article describes the study of fine dust at the stage of packing and packaging of particulate material. Attention is given to fine particles, which is PM10 and PM 2.5, that have a negative impact on human health in the process of packaging chemicals.The object of the study is the sodium salt of naphthalene-2-sulfonic acid, which is the starting crude in the chemical industry and organic synthesis.As a result of the sedimentation analysis, the sizes of the particles deposited in the experimental setup were determined and, based on the data obtained, the particle size of dust was formulated depending on the settling time.The results obtained are used in the engineering of aspiration systems in industrial plants.

Keywords: fine particles, chemical dust, sedimentometry, PM10, PM2.5, particle size distribution, naphthalene-2-sulfonic acid sodium salt

The paper describes a microscopic method for determining the dispersed composition of particles, a scheme for analyzing the dispersed composition of particles of various materials, the fundamentals of algorithms used in computer programs for the processing of particulate dispersion and the development of recommendations for their improvement.

Keywords: computer data analysis, technique, dispersion, particle diameter, dust, dispersed materials, ecology