System Design
April 2020 3-6 06-237619-001
Table 3-3. IG-55 SI Units Total Flooding Quantity
Temperature
t
°C
Specific
Vapor
Volume
S
IG-55 mass required per unit volume of protected space, m/V (kg/m3)
Design Concentration (volume %)
m3/kg 34% 38% 42% 46% 50% 54% 58% 62%
-25 0.5993 0.693 0.798 0.909 1.028 1.157 1.296 1.448 1.615
-20 0.6114 0.680 0.782 0.891 1.008 1.134 1.270 1.419 1.583
-15 0.6235 0.666 0.767 0.874 0.988 1.112 1.245 1.391 1.552
-10 0.6356 0.654 0.752 0.857 0.969 1.091 1.222 1.365 1.522
-5 0.6477 0.642 0.738 0.841 0.951 1.070 1.199 1.339 1.494
0 0.6598 0.630 0.725 0.826 0.934 1.051 1.177 1.315 1.466
5 0.6719 0.618 0.711 0.811 0.917 1.032 1.156 1.291 1.440
10 0.6840 0.607 0.699 0.796 0.901 1.013 1.135 1.268 1.415
15 0.6961 0.597 0.687 0.783 0.885 0.996 1.116 1.246 1.390
20 0.7082 0.587 0.675 0.769 0.870 0.979 1.096 1.225 1.366
25 0.7203 0.577 0.664 0.756 0.855 0.962 1.078 1.204 1.343
30 0.7324 0.567 0.653 0.744 0.841 0.946 1.060 1.184 1.321
35 0.7445 0.558 0.642 0.732 0.828 0.931 1.043 1.165 1.300
40 0.7566 0.549 0.632 0.720 0.814 0.916 1.026 1.147 1.279
45 0.7687 0.541 0.622 0.709 0.802 0.902 1.010 1.129 1.259
50 0.7808 0.532 0.612 0.698 0.789 0.888 0.995 1.111 1.239
55 0.7929 0.524 0.603 0.687 0.777 0.874 0.979 1.094 1.220
60 0.8050 0.516 0.594 0.677 0.765 0.861 0.965 1.078 1.202
m =(V/s)·ln(100/(100-C)), agent mass, kg
W = m/V=(1/s)·ln(100/(100-C)), mass flooding factor, kg/m3
C = agent concentration, vol %
V = volume, m
3
s = a + b*t, specific volume of agent, m
3
/kg, where a and b are agent-specific constants
IG-55: a = 0.6598 kg/m
3
IG-55: b = 0.00242 kg/m
3
-°C
t = temperature, °C
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