Keyword: «st3»

The article considers the problem of operation of vertical steel single-walled tanks (RVS) made of St3 steel in conditions of low climatic temperatures. The analysis of the mechanical properties and cold resistance of the material at subzero temperatures is carried out. Based on the analysis of the stress-strain state of the tank wall and the influence of temperature deformations, the need to limit the maximum level of rise (upper cut-off) is justified to prevent the development of brittle cracks in the stress concentrator areas, primarily in the near-seam zone of the mounting joint, welded joints of the bottom and lower belts of the tank. A method for calculating the safe level of take-off is proposed, taking into account the operating temperature and mechanical characteristics of steel.