Kidde Fire Protection 400 Series, Design, Installation, Operation, And Maintenance Manual

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System Design
July 2018 3-4 06-237518-001
3-3 EXTINGUISHING VALUES
When calculating the required quantity of the selected Agent to be stored, use the most
demanding flammable material involved and the net volume of the protected enclosure/room.
The resulting oxygen concentration after release shall be calculated based on the net volume
and the total quantity of Agent released.
The values listed below are all based on fire extinguishing tests at 20°C:
The extinguishing concentration required is independent of the temperature. However, the
quantity (in kg/m
3
) needed to reach the required concentration is dependent on the
temperature. i.e. the quantity (kg/m
3
) needed reduces at higher temperatures.
It shall be noted that for systems having a relatively large distribution piping system, additional
gas may be required and for systems with relatively short pipe work any such supplement may
not be needed.
Note: The actual minimum required stored Agent quantity can only be verified using the flow
calculation software. Consult the flow calculations software for the specific Agent used.
Table 3-1. ISO Design Concentrations for IG-01 and IG-55
Fuel
IG-01 IG-55
Extinguishment
% by volume
Minimum
design
% by
volume
Extinguishment
% by volume
Minimum
design
% by
volume
Class B Heptane (cup burner) 39.1
50.8
36.5
47.5
Heptane (room test) 33.7 30.2
Surface Class A Wood Crib 30.7
41.9
31.6
41.08
PMMA 31.6 31.6
PP 31.6 31.6
ABS 32.2 31.6
Higher Hazard Class A N/A 48.4 N/A 45.1
Table 3-2. ISO Design Concentrations for IG-100 and IG-541
Fuel
IG-100 IG-541
Extinguishment
% by volume
Minimum
design
% by
volume
Extinguishment
% by volume
Minimum
design
% by
volume
Class B Heptane (cup burner) 32.3
43.7
33.8
43.9
Heptane (room test) 33.6 29.6
Surface Class A Wood Crib 31.0
40.3
28.2
39.9
PMMA 31.0 30.7
PP 31.0 30.6
ABS 31.0 30.7
Higher Hazard Class A N/A 41.5 N/A 39.9