The paper shows the results of experimental studies and the analysis of the impact of long service life of the main gas pipelines, as well as of natural concentrators of stresses on the physical and mechanical p roperties of welded joints of steel 17G1S. A methodology was developed and patterns of gas pipeline welded joint material failure at static and low-frequency loads were established, as well as impact of stress concentrators during prolonged use. Some aspects of the mechanism of pipeline welded joint failure are considered.
Medical Subject Headings: technology, industry, and agriculturerespiratory system
free text keywords: corrosion, damage, pipes, welding joint, working pressure, hydraulics tests