Abstract
According to the surface imperfections of rolling–welding cylinders, a finite element analysis (FEA) model for a cylinder with surface imperfections is proposed, namely, a statistic imperfections model. The maximum permissible geometry deviation values e of statistic imperfections models are computed based on the shape reduced coefficient βcr = 0.8. Compared with the limited value of ASME Code sections Ⅷ-1 and Ⅷ-2, it is clear that the calculated value e/t is positively correlated with the length–diameter ratio L/Do and diameter–thickness ratio Do/t and that the yield strength has a substantial influence on the maximum permissible geometry deviation values, which is not taken into account by Code Ⅷ-2.
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