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Auspex Fire Manual
Water Pressure Loss
Calculation of Potable Water – Principals
The following tables show Pressure Loss for Auspex Fire pipe
at a fluid temperature of 10°C.
Pipe
Size
20mm
25mm
32mm
Flow
Velocity
(m/s)
Volumetric
Flow
(L/s)
Pressure
Loss
(kPa)
Volumetric
Flow
(L/s)
Pressure
Loss
(kPa/m)
Volumetric
Flow
(L/s)
Pressure
Loss
(kPa)
0.5
0.09
0.26
0.15
0.20
0.24
0.15
0.6
0.11
0.37
0.18
0.28
0.28
0.21
0.7
0.13
0.50
0.20
0.36
0.33
0.28
0.8
0.14
0.63
0.23
0.47
0.38
0.36
0.9
0.16
0.78
0.26
0.59
0.43
0.45
1.0
0.18
0.96
0.29
0.72
0.47
0.55
1.2
0.21
1.34
0.35
1.00
0.57
0.76
1.4
0.25
1.78
0.41
1.33
0.66
1.01
1.6
0.29
2.28
0.47
1.71
0.76
1.30
1.8
0.32
2.83
0.53
2.12
0.85
1.61
2.0
0.36
3.43
0.59
2.58
0.95
1.96
2.5
0.44
5.20
0.73
3.90
1.18
2.96
3.0
0.53
7.29
0.88
5.45
1.41
4.14
3.5
0.62
9.73
1.00
7.28
1.65
5.51
4.0
0.71
12.43
1.17
9.31
1.89
7.06
4.5
0.80
15.44
1.32
11.58
2.12
8.79
5.0
0.89
18.81
1.46
14.08
2.36
10.68
Size
Mean OD
Min Wall
Max Mean ID
20mm
20.0
2.3
15.7
25mm
25.0
2.8
19.7
32mm
32.0
3.7
24.5
Factor
1.20
1.14
1.10
1.05
1.02
0.98
0.95
Water °C
20
30
40
50
60
80
90
