Outer diameter of steel pipe

Outer diameter of the steel pipe excluding outer protective cover.

For cables, heat sources and PAC/GIL, we consider $D_{wall}$ to be the diameter below the outer sheath, the insulation over the pipe or the protective cover respectively.

Symbol
$D_{wall}$
Unit
m
Formulae
$\frac{D_e-2t_j}{1000}$Cables
$\frac{do_{pipe}}{1000}$Heat sources
$\frac{D_{encl}}{1000}$PAC/GIL
Used in
$U_{buried}$
$U_{inwall}$
$U_{wall}$
OHTC of pipe wall [W/(K.m$^2$)]