Calculatrice: Surface/Débit d'un tuyau crépiné Calculator: Area/Flow of a screen pipe
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Well Production at AWWA Standard of 1.5 feet per second:
To calculate the flow in gallons per minute per foot of screen, first you must
calculate the percentage of open area of the screen, then use that result to
calculate the flow. Determine the open area for the type of screen used then
convert area to a percentage. Then multiply the percentage by 12 inches per
foot, by the outside diameter, by pi, and the conversion constant of 4.8:
Calculation of percent of open area:
Where: A_{p} = Open Area (percent%)
A = Open Area (sq.inches)
D_{o} = Average outside diameter of screen (inches)
Calculation of open area for shutter type screen:
Where: A = Open Area (sq.inches)
l = Slot length (inches)
o = Width of slot opening (inches)
n = Number of slots per foot
Calculate Ap of shutter screen
Calculation of open area for continuous slot screen:
Where: A = Open Area (sq.inches)
s = Slot size (inches)
w = Wire width (inches)
D_{o} = Average outside diameter of screen (inches)
d = Diameter of rods (inches)
n = Number of rods
Calculate Ap of continuous slot screen
Calculation of the flow in gallons per minute per foot of screen:
Where: F = Flow (gpm/ft of screen)
A_{p} = Open Area (percent%)
D_{o} = Average outside diameter of screen (inches)
= pi or 3.14159

