Chapter 6: Fluid Flow Piping Design and Rating
Nomenclature
Single-phase flow
? 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 |
Two-phase flow
? 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... |