Quantcast Section X. LSV FIRE MAIN

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TM 55-1915-200-SDC
A compartment is dangerous and hazardous to life when it is filled with CO2 due to the lack of oxygen; it shall not be
entered unless the party is wearing OBA. In the use of small portable CO2 extinguishers, the quantity of gas released
from one or several of these cylinders is not usually sufficient to reduce the total oxygen content of the air in a
compartment to a dangerous minimum. Therefore, the fire fighter has basically to consider only the speed with which he
can apply C02 from these to the fire.
If CO2 is applied quickly, the fire will go out immediately. It should be applied to the base of the fire, in a sweeping
motion. In continuous operation, the 15-pound cylinder will be expended in about 40 seconds. A discharged cylinder
must be turned in to the designated area for recharging.
While CO2 extinguishers are designed for hand application, they can be used in a small compartment as a means of
providing partial flooding.
Two or three portable CO2 extinguishers can be placed in the compartment with their valves open. With the doors and
ventilation secured, the CO2 will settle and form a blanket over the lower portion of the compartment. One 15-pound
cylinder will cover the bottom of an 11-foot by 12-foot compartment to a depth of approximately 1 foot.
Section X. LSV FIRE MAIN
6-20. GENERAL. The fire main system (FIGURE 6-5) is made up of two electrically driven pumps, controllers for the
pumps, piping running throughout the vessel, six interior fire stations, six exterior fire stations, and two international shore
connections.
a. Fire pumps. One pump, located in the aft passageway in the Engine Room, is designated the emergency fire
pump. This pump is normally controlled remotely from the control station on the bridge. The other pump is the fire and
bilge pump located in the Engine Room, starboard side at about frame 85. Both pumps are Aurora Model 344, rated at
546 GPM at 257 TDH and 125 psi. The pumps are driven by 60 HP, 3 phase, 60 Hz, 460 V electric motors. The power
supply for the emergency fire pump is the emergency switchboard. The fire and bilge pump is powered from the Engine
Room Motor Control Center.
b. Fire stations.
(1) Internal fire stations are 1-1/2" connections with Wye Gate and 75 feet of hose provided and are located as
follows:
(a) Poop deck, athwartships passageway bulkhead, after port side.
(b) Mezzanine Deck Passageway, recessed in port bulkhead, approximately at frame 105.
(c) Mezzanine Deck Passageway, recessed in starboard bulkhead, approximately at frame 105.
6-15


 


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