API standard 650 welded storage tanks shell compression
The specifications used in the design of large oil tanks, API standard 650 welded storage tanks mainly include American Petroleum Institute Standard API 650, Japanese Industrial Standard JIS B8501, British Industrial Standard BS2654 and Chinese National Standard GB50341 from a global perspective. The formulas used in each specification are based on the hoop stress in the membrane theory. Each specification is based on the performance characteristics of materials and the construction technology level of their respective countries to determine the allowable stresses and weld coefficients. Therefore, the calculation results of tank wall thickness of API standard 650 welded storage tanks with the same volume are sometimes quite different according to different specifications.
While GB50341 generally takes the weld coefficient as 0.9;When the minimum yield strength of API standard 650 welded storage tanks steel plate is greater than 390 MPa, take 0.85. The thickness of API 650 tanks is generally smaller than that of GB50341, and this difference is particularly evident in the design of large tanks, where the overall weight of the tanks varies greatly.
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