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Length $L_e$ for Conical Sections sketch (a) for external pressure

Conical Sections sketch (a) D s D L L c α
Conical Sections sketch (a)

Values for calculation

$L_c$ $\mathrm{mm}$
$D_L$ $\mathrm{mm}$
$D_s$ $\mathrm{mm}$

Calculation

Equivalent length of conical head or Section between lines of support

$$L_e=\left(L_c/2\right)\cdot\left(1+D_s/D_L\right)$$