7-13
September 2004
Argonite
®
Engineered Fire Suppression System
38-KFSARG-000
Figure 7-1. 360° Nozzle Determination
Note:
The maximum enclosure height that may be flooded by a single tier of
nozzles is 16 ft. (4.88 m). For enclosures with ceiling heights above 16 ft.
(4.88 m), nozzles shall be placed at multiple levels/elevations to a maximum
height per elevation of 16 ft. (4.88 m).
The number of nozzles, their size and location in the distribution piping network shall
be such that the desired design concentration will be established within the specified
discharge time in all parts of the protected enclosure, and such that the discharge
will not unduly splash flammable liquids or create dust clouds that could extend the
fire, create an explosion, harm any personnel occupying the enclosure or otherwise
adversely affect the contents or integrity of the enclosure.
Kidde Fire Systems supplies nozzles ranging in size from 1/2 to 1½, with orifices
from 3 mm to 26 mm. The quantity of Argonite per nozzle will vary based on pressure
and orifice size.
In an Argonite system, pipe diameters, nozzle sizes, nozzle orifices and restrictor
sizes shall always be verified by a flow calculation.
When determining the number of nozzles to be used in a system, the shape of the
enclosure (area and volume) as well as the shape of any protected voids (raised
floor, suspended ceiling) must be taken into account. Other important considerations
include: installed equipment in the enclosure/void (chimney effect); pressure in the
pipe (pipe wall thickness); obstructions that may affect the distribution of the
discharged Argonite; and architectural considerations, i.e., a warehouse may allow
for the use of a 1½ nozzle whereas an office environment may require a number of
smaller nozzles.
In hazards with suspended ceilings, room nozzles shall be installed in such a way
that the jets from the nozzles do not damage the ceiling tiles excessively during
discharge. For lightweight ceiling tiles, it is recommended that the tiles be securely
anchored around each discharge nozzle. In addition, consideration shall also be
given to having nozzles installed above the ceiling (simultaneous discharge) in order
to equalize the pressure during discharge, thus reducing the risk of unnecessarily
damaging ceiling tiles.
Содержание Argonite
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