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

Conical Sections sketch (d)

Values for calculation

Axial length of cone or conical section

$L_c$ $\mathrm{mm}$

Outside diameter at large end of conical section under consideration

$D_L$ $\mathrm{mm}$

Outside diameter at small end of conical section under consideration

$D_s$ $\mathrm{mm}$

Outside diameter at small end of conical section under consideration $ D_{ss} $

$D_{ss}$ $\mathrm{mm}$

Outside radius at small end of conical section under consideration

$r_2$ $\mathrm{mm}$

One‐half of the included (apex) angle of the cone at the centerline of the head

$α$ $\mathrm{°}$

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

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