fireflow
/ fire protection equations
Standard
Darcy-Weisbach
Head loss per foot =
*
2
*
2* 32.2 *
Hazen-Williams
psi per foot =
4.52 *
1.85
1.85
*
4.87
Fire Hydrant Flow Test
Flow =
29.83 *
*
2
* √
Flow Available at Interested Pressure
Available Flow =
*
-
0.54
Static psi -
Expected Pitot Pressure
Pressure (psi)=
(
29.83 *
*
)
2
Flow Velocity
Velocity =
* 144
π *
2
* 7.48 * 60
Metric
Darcy-Weisbach
Head loss per meter =
*
2
*
2* 32.2 *
Hazen-Williams
pascal per meter =
10.67 *
1.85
1.85
*
4.87
Fire Hydrant Flow Test
Flow (L/min)=
.0666 *
*
2
* √
Flow Available at Interested Pressure
Available Flow =
*
-
0.54
Static psi -
Expected Pitot Pressure
Pressure (kPa)=
(
0.0666 *
*
)
2
Flow Velocity (m/s)
Velocity =
21.22 *
2
