Chapter 6: Fluid Flow Piping Design and Rating

Nomenclature

? P		pipe segment pressure loss, psi
? P _d		static leg pressure loss, psi
? P _T		total pipe run pressure loss, psi
?		pipe absolute roughness, ft
?		time for acceleration, s
?		fluid viscosity, cP
?		fluid density, lb/ft ³
A		Chen s equation constant f, ?/(3.7 D)
B		Chen s equation constant f, 5.02/Re
C		conversion constant
C _v		constant of water flow rate in a valve at 60 F with a 1.0-psi pressure drop across the valve, gpm
d		pipe diameter, in
D		pipe internal diameter, ft
f		friction factor for internal resistance to flow in pipe, dimensionless
F _p		force of flowing fluid, ft lb
g		acceleration of gravity, 32.2 ft/s ²
h _L		loss of static pressure head due to fluid flow, ft
h _s		total static leg rise or fall, ft
K		resistance coefficient, dimensionless
L		straight pipe length, ft
P _1,2		pressure at points 1 and 2, psig
Re		Reynolds number, dimensionless
v		fluid velocity, ft/s
W		fluid flow rate, lb/h
W _m		mass, lb
Z _1,2		static head of fluid above reference level, ft

? P _A		two-phase flow acceleration pressure loss, psi
? P _E		pressure loss from elevation changes, psi
? P _ell		90 standard ell in two-phase flow, psi
? P _f		pipe...

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