User's Manual

Design
September 2013 3-80 P/N 81-CO2MAN-001
3-16.3 Location
Hand hose line systems shall be placed such that they are easily accessible and that the hose
length is adequate to reach the most distant hazard. In general, they should not be located
where they will be exposed to the hazard, nor shall they be located inside any hazard area
protected by a total flooding system.
The hose shall be coiled on a Hose Reel, P/N WK-994058-000, or Rack, P/N 81-919842-000,
such that it will be ready for immediate use without the necessity of coupling and that it can
be uncoiled with a minimum of delay. If installed outdoors, it shall be protected against the
weather.
The carbon dioxide supply shall be located as close to the hose reel or rack as possible so that
liquid carbon dioxide will be supplied to the hose line with a minimum of delay after actuation.
If multiple hose stations are used, they shall be spaced so that one or more hose lines can
cover any area within the hazard.
3-16.4 System Design
The rate and duration of discharge shall be determined by the type and potential size of the
hazard. A hand hose line shall have a quantity of carbon dioxide to permit its use for at least
1 minute. The possibility of these hose lines being used by inexperienced personnel shall be
considered, and a provision shall be made so that there will be a supply of carbon dioxide to
enable personnel to effect extinguishment of the hazards that they are likely to encounter.
3-16.4.1 FLOW RATE
Once a convenient cylinder location, hose location and pipe routing have been determined, a
hydraulic calculation shall be performed to determine the nominal flow rate of the system. The
equivalent lengths in Table 3-14 and Table 3-15 may be used to calculate pressure loss
through the various components. Each equivalent length is given in multiple pipe sizes for
convenience. The Horn/Valve Assembly may be modeled as a Code 8.5 Type V nozzle.
Table 3-14. Equivalent Lengths of Hand Hose Line Components (US Units)
P/N Description
Equivalent Length Nominal Pipe Size
1/2 in. 3/4 in. 1 in.
Sch 80 Sch 40 Sch 80 Sch 40 Sch 80
WK-994058-000 Hose Reel (Swivel Joint) 10 20 7 12 -
81-961966-000 Hose, 1/2 in. x 50 ft. 63 124 312 541 -
81-918435-000 Hose, 3/4 in. x 50 ft. - - 37.5 65 143
81-980564-000 Horn and Valve Assembly (Shutoff
Valve)
1.5 2.5 - - -