Protection Engineer to determine need for reserve
tanks.
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Tank shall be designed for storage of AFFF concentrate at atmospheric
pressure, and shall be [horizontal] [or] [vertical] cylindrical, fiberglass
or polyethylene construction. Tank shall have the following: Drain valve
located at the lowest point in the tank, connections for concentrate supply
and return lines to the proportioners, top-mounted fill connections and
inspection hatch, and a pressure/vacuum relief vent. All openings and tank
connections shall be installed at the factory, no holes shall be made in
the tank shell in the field. Tank shall include all necessary supports for
free-standing installation. Provide a gage or unbreakable sight glass to
permit visual determination of level of tank contents, unless liquid level
is clearly visible through shell of tank. Size tank to provide sufficient
AFFF concentrate for the time specified when the system is discharging foam
solution at total maximum system flow. [Also provide connected reserve
tank(s) of equal capacity.] Permanently label each tank with its capacity,
type and percentage of concentrate, which system it serves [, and whether
it is a main or reserve tank].
[2.16
WATER MONITOR NOZZLES
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NOTE: Refer to MIL-HDBK-1008 to determine the
density required.
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Manually operated, [free standing] [hydrant mounted] type with 6.30 radian
360 degree rotation and capable of being locked at any position. Nozzle
shall be adjustable while in operation from 0.35 radian 20 degrees below to
1.40 radian 80 degrees above horizontal, with lock or latching mechanism.
[Nozzle shall be adjustable while in operation from straight stream to
spray.] Nozzle shall produce a straight stream of 46 meters 150 feet at
[1920 L/m] [500 gpm] [_____] and [690 kPa (gage)] [100 psig] [_____].
Provide [post indicator] [0S&Y gate] [quarter-turn indicating] valve in
water supply line at each monitor location.
][2.17
HAND HOSE LINES
At each hose station, provide [flow-through reel with 40 mm 1 1/2 inch hard
rubber] [automatic hose rack in cabinet with 40 mm 1 1/2 inch lined, double
jacket] hose and nozzles. Provide minimum [_____] meter feet of hose.
Nozzle shall have pistol-grip ball shutoff valve. Nozzle shall be [non
aspirating] [air aspirating] type. Provide normally closed quarter-turn
valve in supply line at each hose station. Nozzle flow rate shall be [139
L/m] [50 gpm] [_____] minimum.
]2.18
FOAM HYDRANTS
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NOTE: Provide foam hydrants for testing of
proportioners or where additional foam hand hose
lines are required. Determine number of outlet
connections based upon a ratio of one outlet for each
948 L/m 250 gpm of design flow, up to a maximum of
8 outlets.
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SECTION 13957N
Page 32
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