Modeling of the stressed-deformed state of the apparatus under pressure at corrosion

Abstract

Vessels and apparatuses operating under pressure at hazardous production facilities are operated under conditions of many factors that limit the safe service life. These factors include elevated pressures and temperatures, damage during operation, exposure to both static and cyclic loads, etc. The most common and determining damage to metal equipment is corrosion wear. Corrosion wear negatively affects reliability during operation, gradually reducing the strength of the technical device by reducing wall thicknesses and thereby bringing the object closer to its ultimate state. As a rule, visual inspection and thickness measurements make it possible to identify corrosion zones, analyze these zones and give recommendations for further operation or replacement of defective areas. However, some designs of vessels and apparatuses do not give the opportunity to carry out work on the assessment of the corrosion state in full, and in this regard, there is a possibility that adverse sections will be skipped. Especially such problems arise when diagnosing devices with multiple workspaces. Currently, the work on modeling equipment of this type with the use of specialized software systems for assessing the stress-deformed state taking into account all the factors present and identifying the most unfavorable zones with maximum effective stresses is relevant. In this paper, we study the interconnection between the effect on the apparatus with a shirt of operating parameters when modeling various scenarios of corrosion wear.