# Length $L_e$ for Conical Sections sketch (b) for external pressure

## 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

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