7 - 9
September 2004
Argonite
®
Engineered Fire Suppression System
38-KFSARG-000
7-10.2
Leakage
Not only is it important that the Argonite design concentration be achieved within
the prescribed discharge time, but also that the extinguishing concentration is
maintained for the specified period of time to allow effective emergency action by
trained personnel. This is equally important in all classes of fires (A, B, C) since a
persistent ignition source (e.g., an arc, heat source, oxyacetylene torch or deep-
seated fire) can lead to a resurgence of the fire once the Argonite has dissipated.
It is necessary to insure that the agent leakage does not occur during discharge
and that the required concentration levels can be maintained for the entire holding
period. Guidelines as established by NFPA 2001 should be followed.
7-10.3
Temperature Considerations
During discharge the temperature within the protected enclosure will drop
approximately 10°F to 20°F (5°C to 10°C). The temperature will rise again after
approximately 2 to 3 minutes.
7-10.4
Flow Calculation
The Kidde Fire Systems flow calculation program must be used to design an Argonite
system. Refer to the Argonite Flow Calculation Software Manual, P/N 38-KFSARG-100,
for details on the flow calculation program used by Kidde Fire Systems. It is based on
the input of:
Cylinder storage pressure at 70°F (21.1°C).
Hazard enclosure temperature (start of pipe).
Hazard enclosure volume(s), raised floor, room and suspended ceiling as applicable.
Specific Argonite Quantity (kg).
Argonite design concentration.
Cylinder size (15.9 L, 66.7 L or 80 L).
Number of cylinders.
Discharge time required (normally 60 seconds).
Minimum and maximum temperatures of the hazard.
Number of nozzles selected per hazard.
Piping data, estimated pipe dimensions and pipe schedule.
Maximum pressure the enclosure/building structure can withstand.
The program shall calculate and determine/verify:
Orifice diameter for the restrictor(s).
Pipe sizes and required pipe schedule.
Maximum pressure in distribution pipe network.
Orifice diameter for each individual discharge nozzle.
Estimated size of pressure relief vent opening.
Final Argonite concentration for each protected hazard.
Actual discharge time (95% of design concentration).
Содержание Argonite
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