Table 1 Shell geometrical tolerance from selected design codes
Codes | Imperfection tolerance |
|---|---|
DnV [138] | \({w}_{o}=\frac{0.05 {l}_{r}}{1+\frac{{l}_{r}}{r}}, {l}_{r}=4\sqrt{rt}\) |
ECCS [25] | \({w}_{o}=0.01 {l}_{r}, {l}_{r}=4\sqrt{rt}\) |
API [81] | \({w}_{o}=0.01{ l}_{r}, {l}_{r}=4\sqrt{rt}\) |
\({w}_{o}={U}_{\text{rmax}}{l}_{g\theta , x}, { l}_{g\theta ,\text{ circumferential}}=2.3({l}^{2}rt{)}^{0.25}\) \(or{ l}_{\text{gx},\text{ axial compression}}=4\sqrt{rt}\) |