CEA 4001 - Page 42

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6.3.2 HHP and HHS systems without in-rack sprinklers
NOTE: in-rack sprinklers must always be fully calculated (see G.3).
The water supply shall be capable of delivering at the highest design point not less than the appropriate
flow and pressure specified in table 8, or as modified in 6.3.2.1 to 6.3.2.4.
The total requirement for the pressure at the control valve set shall be the sum of the pressure at the
design point, the pressure equivalent of the difference in height between the control valve set and
the highest sprinkler downstream of the design point and the pressure loss for the flow in the piping
from the control valve set to the design point.
T
Table 8: Pressure and flow requirements for installations designed using Tables G11 to G14
Design
density
mm/min
Flow required l/min
Pressure at the highest design point bar
Area of operation per sprinkler m²
Wet or pre-
action
Dry or
alternate
6
7
8
9
(1) With pipe diameters in accordance with Tables G11 & G12 and sprinklers having a K factor of 80
7,5
10,0
2 300
3 050
2 900
3 800
-
1,80
-
2,25
3,90
(2) With pipe diameters in accordance with Tables G11 & G13 and sprinklers having a K factor of 80
7,5
10,0
2 300
3 050
2 900
3 800
-
1,30
-
1,80
1,35
2,35
1,75
3,00
(3) With pipe diameters in accordance with Table G13 & G14 and sprinklers having a K factor of 80
7,5
10,0
2 300
3 050
2 900
3 800
-
0,70
-
0,95
0,70
1,25
0,90
1,60
(4) With pipe diameters in accordance with Tables G13 & G14 and sprinklers having a K factor of 115
10,0
12,5
15,0
17,5
20,0
22,5
25,0
27,5
30,0
3 050
3 800
4 550
4 850
6 400
7 200
8 000
8 800
9 650
3 800
4 800
5 700
6 000
8 000
9 000
10 000
11 000
12 000
-
-
0,95
1,25
1,65
2,05
2,55
3,05
3,60
-
0,90
1,25
1,70
2,25
2,85
3,50
4,20
4,95
-
1,15
1,65
2,25
2,95
3,70
4,55
5,50
6,50
0,95
1,45
2,10
2,80
3,70
4,70
5,75
6,90
-
6.3.2.1
Where the area of the HHP or HHS portion of an occupancy is less than the area of operation, the
flow rate in Table 8 can be proportionately reduced, (see 6.3.2.5), but the pressure at the highest sprinklers in
the area shall either be equal to that shown in the table for the appropriate flow rate or be determined
by hydraulic calculation.
6.3.2.2
When the HHP or HHS portion of occupancy involves less than 48 sprinklers, the flow rate and