System Design
06-237619-001 3-21 April 2020
3-15.4 Pipe Sizing
The following table may be used as an estimating guide for sizing distribution piping. This table
is intended for use as a guide only. Use the Kidde IGS Flow Calculation software for the final
design.
3-15.5 Temperature Limitations
3-15.5.1 Operating/Storage Temperature Range
The Kidde IGS equipment listed herein is designed to operate within the range of
-4° to 130°F (-20° to 54°C). The Kidde IGS Flow Calculation software assumes a temperature
of 20°C (68°F).
3-15.5.2 Storage Temperature
Kidde IGS equipment is suitable for storage from -4° to 130°F (-20° to 54°C).
3-15.6 Cylinder Actuation Limitations
The following table lists how many cylinders can be actuation from one release unit or dis-
charge delay:
Table 3-12. Pipe Size Estimating Table
Nominal
PipeSize
(inches)
Flow Rate (lb./sec.) Flow Rate (kg/s)
Minimum
Design
Max. Nom.
Design
Minimum
Design
Max. Nom.
Design
1/4 in 0.06 0.32 0.03 0.15
3/8 in 0.11 0.59 0.05 0.27
1/2 in 0.17 0.94 0.08 0.43
3/4 in 0.3 1.7 0.14 0.77
1 in 0.5 2.83 0.23 1.28
1-1/4 in 0.9 5.03 0.41 2.28
1-1/2 in 1.24 6.96 0.56 3.16
2 in 2.1 11.76 0.95 5.34
2-1/2 in 3.05 17.09 1.38 7.75
3 in 4.81 26.98 2.18 12.24
4 in 8.52 47.77 3.86 21.67
5 in 13.7 76.82 6.22 34.85
6 in 20.16 113.04 9.15 51.28
Table 3-13. Maximum Number of Cylinders that can Be Actuated per Actuation Device
Actuation Method Maximum Number of 80L Cylinders
Release Unit 62
Discharge Delay 44
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