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Diameter
inch
mm
Pressure Drop
Pa
atm
bar
Kg/cm2
psi
mm H2O
mm Hg
inch Hg
Pressure
Kg/cm2 G
Kg/cm2 A
Bar G
Bar A
PSIG
PSIA
Atm G
Atm Abs
KPaG
KPa Abs
Temperature
° C
° K
° F
° R
Volume Flowrate
Nm3/h
Sm3/h
m3/h
m3/s
SCFM
MMSCFD
ACFM
Actual cubic meter per hour @ Inlet Conditions
Small Diameter Orifice Flow Meter Calculation
- For Gas Flow computes flowrate, orifice diameter or differential pressure for pipe diameter < 40 mm based on equations specified in ASME MFC-14M-2001.
Data
Solve for
Flowrate
Orifice Diameter
Pressure Drop
Type of Tap
Flange
Corner
Pipe Diameter
(D1)
mm
Orifice Diameter
(D2)
mm
Flowrate
(Q)
m
3
/h
Pressure Drop
Pa
Cp/Cv, k
Gas Viscosity
cP
Pressure
(P1)
Bar A
Temperature
(T1)
°K
Molecular Weight
Solution