Cableizer

Diameter over armour

For TECK armour we consider the corrugation depth to be half the thickness of the layer, so the diameter increases by the thickness.

Symbol
$D_{ar}$
Unit
mm
Formulas
$D_{ab}+2\left(t_{a,1}+t_{a,2}\right)$round wires, flat wires
$D_{ab}+2n_{a,1} t_{a,1}$steel tape armour
$D_{ab}+\left(2+1\right) t_{a,1}$TECK
Related
$D_{ab}$
Diameter over armour bedding [mm]
$n_{a,1}$
Number of wires armour 1
$t_{a,1}$
Thickness armour 1 [mm]
$t_{a,2}$
Thickness armour 2 [mm]
Used in
$C_{ag}$
Capacitance armour - ground [F/m]
$D_{j}$
Diameter over jacket [mm]
$J_{ar}$
Moment of inertia (bending) armour [mm$^4$]
$J_{j}$
Moment of inertia (bending) jacket [mm$^4$]
$p_{ab}$
Apportioning factor armour bedding
$p_{j}$
Apportioning factor jacket
$r_{z5}$
Radius armour (outer) [m]
$\rho_{ar}$
Specific electrical resistivity armour material [$\Omega$.m]