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Pressure Drop Calculation
Pressure Drop Calculation
Equivalent Length
FLUID DATA
Flow rate
Q
liter/hr
liter/min
m3/s
Density
d
kg/m
3
Dynamic viscosity
m
cP (mPa·s)
Kinematic viscosity
u
cSt (mm2/s)
PIPE DATA
Inner diameter
Di
mm
Surface roughness
e
,k
mm
Total pipe length
L
m
Elevation
z
m
Pressure loss extra equipment
Pe
bar
Pipe area
mm
2
Pipe volume
liter
EQUIVALENT LENGTH
Bends and elbows
l/d
Valves
l/d
Fittings and appendages
l/d
m
RESULTS
Reynols number
Re
Average velocity of liquid
v
m/s
Friction factor
F
Relative roughness
K/Di
m/s
TOTAL PRESSURE DROP
Pipe+equipment+appendages
mH2O
bar
Pa
Bends/Tees
Quantity
180 bend, R=5D
28
90 bend, R=5D
16
90 bend (square , R=1.5D)
20
45 bend(square , R=1.5D)
16
Tee (flow straight through)
20
Tee (flow through side outlet)
65
l/d
Gates/Valves
Quantity
Gate valve open
13
¼-closed
39
½-closed
195
¾-closed
300
Membrane valve
200
Ball valve (spherical plug valve)
18
Needle valve
1000
Butterfly valve (larger then 6 inch)
20
Globe valve
300
Nozzle (suction nozzle on vessel)
32
Check valve (in-line ball type)
150
Check valve (swing type)
135
Filter (Y-type and bucket type)
250
l/d