Methods of increasing the corrosion resistance of underground water supply pipelines

Abstract

The main causes of premature destruction of the pipeline network of water supply and drainage within the territory of Ukraine are the following: factory (metallurgical) defects of pipes, assembly defects (as a rule, they occur during installation work directly on the object), corrosion damage and destruction of the pipe body and welded connection, natural and deformational aging of metal, external loads and internal excess stresses, lack of high-quality anti-corrosion protection, long (exceeding normative) service life of pipelines that are in direct contact with a corrosive-aggressive environment, etc. Analysis of the general condition of centralized water supply and centralized water drainage systems for 2021. Carried out for 19 regions and the city of Kyiv. Based on the analysis, the following conclusions were drawn: centralized water supply covers 98.7% of cities (absent in 4 cities), 90.3% of rural settlements (absent in 46 rural settlements), and 23.5% of rural settlements, 67.4% of rural settlements and 1.5% of rural settlements. To ensure the development and reconstruction of systems of centralized drinking water supply and centralized water drainage in populated areas of Ukraine and to provide the population with quality drinking water in sufficient quantity, the Ministry of Regions has developed the State-wide target program "Drinking water of Ukraine", which provides for the implementation of more than 1,747 infrastructure projects in the regions during 2022-2026 years In addition, the following measures are recommended for the development of water supply and drainage enterprises: the creation of effective response systems in case of emergency situations, in particular, a logistics chain for the supply of the necessary welding and assembly resources (materials, equipment, labor, etc.); attraction of investments for the modernization of water supply and treatment facilities of the central drainage system; carrying out scientific and research works for the purpose of modernization of engineering facilities for wastewater treatment; modernization of pipeline structures and treatment facilities with the involvement of modern welding and assembly technologies and materials. In addition, in order to increase the reliability of water supply and sewage networks, it is now necessary to carry out certification and inspection of pipelines. Knowing the degree of wear and tear of the pipe wall and the service life, you can calculate the nominal pressure of the pipeline and make a decision about its replacement or rehabilitation. Using the failure criterion for "critical" points, it is possible to predict the complications of network operation, model redundancy for them, and optimize their operation. It is proposed to equip specialized mobile laboratories on the basis of water utilities, which allow network diagnostics and emergency cleaning of pipelines and water disinfection. Specialists of the Ministry of Development of Communities and Territories of Ukraine carried out systematic work on assessing the technical condition of water supply networks. The materials officially provided by the Ministry of Health of Ukraine and the Ministry of Environmental Protection and Natural Resources of Ukraine served as the basis for such works. The curator of this work was the State Enterprise "Scientific-Research and Design-Technological Institute of Urban Economy" (Kyiv).