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Thickness of shells under external pressure for Hemispherical Heads

Hemispherical Head D L t s R o
Hemispherical Head

Values for calculation

$ T $ $ \mathrm{°C} $
$ P $ $ \mathrm{MPa} $
$ R_o $ $ \mathrm{mm} $
$ t_s $ $ \mathrm{mm} $
$ B $ $ \mathrm{MPa} $

Calculation

Factor $ A $

$$A=\cfrac{0.125}{\left(R_o/t_s\right)}$$

Calculated value of maximum allowable external working pressure for the assumed value of $ t_s $

$$P_a=\cfrac{B}{\left(R_o/t_s\right)}$$

$$P\le P_a$$