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

Conical Sections sketch (d) D Ls L c α D L r 1 D ss D s r 2
Conical Sections sketch (e)

Values for calculation

$L_c$ $\mathrm{mm}$
$D_L$ $\mathrm{mm}$
$D_s$ $\mathrm{mm}$
$D_{Ls}$ $\mathrm{mm}$
$D_{ss}$ $\mathrm{mm}$
$r_1$ $\mathrm{mm}$
$r_2$ $\mathrm{mm}$
$α$ $\mathrm{°}$

Calculation

Equivalent length of conical head or Section between lines of support

$$L_e=\left(r_1+r_2\cdot\cfrac{D_{ss}}{D_{Ls}}\right)\cdot\sin(α)+\cfrac{L_c}{2}\cdot\left(\cfrac{D_L+D_s}{D_{Ls}}\right)$$