Pipeline Toolbox
Function Reference Manual
Early Public Release DD-00011-000

3.7.1 unwin_p - Unwin Formula ΔP
p = unwin_p(w,l,d,v)

Calculates the pressure drop of a steam pipe using the Unwin formula.

Arguments

w

Steam flow rate (kg /h).

l

Pipe length (m).

d

Pipe diameter (m).

v

Specific volume (m3/kg ).

Returns Pressure drop ΔP (kPa ).