Abstract: Aiming at the bottom design problems of vertical storage tanks, this paper compared the basis for the setting, thickness selection and width selection of the annular edge plate among different standards (GB 50341—2014, API 650—2020, JIS B 8051—2013 and BS EN 14015—2004). The results show that there are differences in the setting, thickness selection, and width selection of the annular edge plate in different standards. Among them, there are more detailed regulations on the thickness of the annular edge plate in GB 50341 and API 650. And the calculation of the width of the edge plate is basically the same in different standards. The paper also reached the following conclusions through comparative analysis: reasonable weld position, quantity, length and assembly process can reduce welding deformation effectively, which is conducive to ensuring the safe operation of the tank; adjusting the thickness of the edge plate reasonably can optimize the deformation coordination of the bottom ring tank wall and the edge plate, and improve the seismic resistance of the storage tank. However, if the edge plate is too thick, it will increase the stress level in the connection area between the bottom ring tank wall plate and the edge plate as well as in the nearby area. Therefore, it is necessary to consider the amount of deformation, tank seismic resistance, and stress level to determine the thickness of the edge plate.

Key words: storage tank, edge plate, tank bottom design, construction process