Project : LULU MALL, LUCKNOW

FIRE PUMP HEAD CALCULATION - HYDRANT SYSTEM

Pump Flow 2850 LPM
Pipe Dia 150 mm

Pipe Friction Loss (p) Calculation based on Hazen Williams formula:

6.05*10^5 * L *Q^1.85
=
C^1.85 *d^4.87
Where:
p Loss of Pressure per meter length of pipe
Q Flow rate through the pipe (in LPM) 2850
d Mean bore of the pipe (in MM.) 150
C Hazen Williams Roughness Coefficient 120
L Equivalent length of pipe and fittings (in Mtr.) Calculated as per table below 999.487

Where:
C' Hazen Williams Roughness Coefficient
Cast Iron 100
Mild Steel 120
Galvanized Steel 120

L Equivalent length of pipe and fittings (in Mtr.) as per IS:15105

2.0 8.61 7.17 6.38 6.21
Node Fittings for 150mm Dia 150 mm
Total Remarks
Bend Eq. Leng. Tee Eq. Length NRV Eq. Length B.F Eq. Leng. Ex. Bellow Eq. Length Pipe Leng.
Pump Discharge 2 4 1 8.61 1 7.17 1 6.38 1 6.21 2.000 34.37
A-B 1 2 1 6.38 0.216 8.596
B-C 1 2 34.625 36.625
C-D 1 2 16.321 18.321
D -E 1 2 309.211 311.211
E-F 1 2 36.937 38.937
F -G 1 2 44.177 46.177
G-H 1 2 34.138 36.138
H-I 1 2 28.904 30.904
I-J 1 2 63.864 65.864
J-K 1 2 85.942 87.942
K-L 1 2 37.152 39.152
L-M 1 2 121.388 123.388
M-N 1 2 60.816 62.816
N-O 1 2 18.429 20.429
O-P 1 2 1.177 3.177
P-Q 1 2 0.540 2.54
Q - 8th Floor MLCP 1 2 26.500 28.5
8th Floor MLCP-FHC 1 2 1 1.2 1.200 4.4
Total 999.487

Pressure loss due to friction loss 5.36 bar

Pressure loss due to friction loss 54.63 Mtr.

Required min. pressure at theFarthest/Highest Hydrant 35 Mtr.

Building Height upto Farthest/Highest Hydrant from fire pump room 26.5 Mtr.

Total Head Requirement 116.13 Mtr.

Add 10% for FOS 127.74 Mtr.

Proposed Pump Head 130 Mtr.