7-5
September 2004
Argonite
®
Engineered Fire Suppression System
38-KFSARG-000
7-8.2 ISO Design Concentrations
The minimum design concentration for all hazards shall be the extinguishing
concentration of the flammable times a safety factor of 1.3.
7-9 DESIGN FACTORS
In addition to the concentration requirement, additional Argonite may be required
due to special conditions that would affect the extinguishing efficiency, such as
unclosable openings and their effect on distribution and maintaining concentration;
reignition from heated surfaces; enclosure geometry; and obstructions and their
effect on distribution.
7-9.1 Effects of Altitude
At elevations above sea level, Argonite expands to a greater specific vapor. A system
designed for sea level will develop a greater concentration level at an elevation
above sea level. To correct for the effects of a higher elevation, the quantity of
agent used should be reduced. The correction factors are listed in Table 7-2.
Table 7-2. Elevation Correction Factors
Altitude Enclosure Pressure
Correction Factor
ft. km PSIA cm Hg
-3000 -0.92 16.25 84.00 1.11
-2000 -0.61 15.71 81.20 1.07
-1000 -0.30 15.23 78.70 1.04
0 0 14.71 76.00 1.00
1000 0.30 14.18 73.30 0.96
2000 0.61 13.64 70.50 0.93
3000 0.92 13.12 67.80 0.89
4000 1.22 12.58 65.00 0.86
5000 1.52 12.04 62.20 0.82
6000 1.83 11.53 59.60 0.78
7000 2.13 11.03 57.00 0.75
8000 2.44 10.64 55.00 0.72
9000 2.74 10.22 52.80 0.69
10000 3.05 9.77 50.50 0.66
Note: Multiply the correction factor by the seal level design quantity of Argonite to obtain the correct quantity
for a given altitude.
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