Proposals Design of Steel Storage Tanks for Gas and Oil Products

Abstract

The article presents general recommendations for the calculation of steel tanks for gas and petroleum products storage. The analysis of the existing structural forms of tanks is carried out and their classification is provided. The paper analyzes the main types and features of tanks. Optimal dimensions and parameters of steel tanks are given. The article presents coefficients of working conditions for the calculation of vertical cylindrical tanks elements. The article details calculation of the tank wall and negative tolerances on the thickness of the steel sheet. The stress–strain state of the tanks is estimated according to the theory of shell calculation. This assessment takes into account only the ring and meridional stresses, operational snow and wind loads, temperature and aggressive effects. Negative trends of reducing the indicators of bearing capacity, operational reliability and durability of steel tanks were revealed. A variant of calculated diagram of the fluid pressure on the tank wall is presented. Calculation proposals based on the experience of designing steel tanks are formed. An example of calculation of a steel vertical tank is considered. The formula of calculation of the tank wall belt from condition of strength provision (according to the first group of limit states) is presented. The formula for checking the stresses in the lower zone of the tank wall taking into account the action of the boundary moment is also obtained.