hazen_williams_p - Hazen-Williams pressure drop P

3.5.1 hazen_williams_p - Hazen-Williams pressure drop $P$

r = hazen_williams_p(q,d,c,sg=1)

Calculate the Hazen-Williams pressure drop across a pipeline. Common values for the roughness factor of the pipe $C$ by material are provided in table 3.5.1.


Material	Range for $C$

Asbestos-Cement	$140$
Cast iron new	$130$
Cast iron after 10 years	$[107,113]$
Cast iron after 20 years	$[89,100]$
Cement-Mortar Lined Ductile Iron Pipe	$140$
Concrete	$[100,140]$
Copper	$[130,140]$
Steel	$[90,110]$
Galvanized Iron	$120$
Polyethylene	$150$
Polyvinyl chloride	$150$
Fibre-reinforced plastic	$150$
Tin	$130$
Lead	$[130,140]$