Emerson Process Management 3422 User Manual
296
Miscellaneous conversion factors
Miscellaneous equations
Reference, Installation, and Operations Manual
June 2013
3-9000-743 Rev S
Volumetric Flow Rate
Equation B-3 Volumetric Flow Rate - U.S. Customary Units
where
Equation B-4 Volumetric Flow Rate - Metric Units
where
=
volumetric flow rate (ft
3
/h) (
QMeter)
=
gas flow velocity (ft/s) (
AvgFlow)
=
geometric constant, pi (dimensionless) (3.14159265...)
=
pipe inside diameter (in) (
PipeDiam)
=
volumetric flow rate (m
3
/h) (
QMeter)
=
gas flow velocity (m/s) (
AvgFlow)
=
geometric constant, pi (dimensionless) (3.14159265...)
=
pipe inside diameter (m) (
PipeDiam)
Q
ft
3
hr
⁄
V
ft s
⁄
3600
×
s hr
⁄
πD
in
2
4
-----------
1ft
12in
-----------
2
×
×
=
V
ft s
⁄
D
in
2
×
3600
π
×
4
12
2
×
---------------------
s ft
2
hr in
2
--------------
×
=
V
ft s
⁄
D
in
2
×
19.63495 s ft
2
(
) hr in
2
(
)
⁄
(
)
×
=
Q
ft
3
hr
⁄
V
ft s
⁄
π
D
in
Q
m
3
hr
⁄
V
m s
⁄
3600
×
s hr
⁄
πD
m
2
4
-----------
×
=
V
m s
⁄
D
m
2
×
3600
π
×
4
--------------------- s hr
⁄
(
)
×
=
V
m s
⁄
D
m
2
×
2827.433 s hr
⁄
(
)
×
=
Q
m
3
hr
⁄
V
m s
⁄
π
D
m