|
| |
TM 07661B-14/1
APPENDIX A
(2)
Aqueous Film Forming Foam (AFFF) conforming to MIL-F-24385, type 6.
A 1-4. PHYSICAL DSCRIPTION. The Self Contained Dry Chemical and AFFF Fire Extinguisher (figure 1-1) hereinafter
referred to as "the extinguisher" is built for rugged use and is treated with corrosion resisting coatings and polyurethane
base paint. The unit is therefore extremely durable over a wide range of climatic conditions. The frame is of heavy gage
steel, welded, with steel skids integrated into it. The frame also has slots provided for lifting with a forklift and lifting eyes
to anchor the fire extinguisher to a truck-bed or aircraft floor and to facilitate lifting or towing. The frame provides a
stable platform for the two independent fire-fighting systems comprising the extinguisher. The remote hose cart provided
with the fire extinguisher is also constructed for rugged use. The two-wheel cart is equipped with a hose reel and hoses
identical to those of the fire extinguisher. Hoses of both units, as well as the discharge nozzles, are equipped with quick-
disconnect fittings which allow rapid connections of the additional hoses. Physical properties of the uncrated fire
extinguisher are presented in Table 1-1.
A 1-5. FUNCTIONAL DESCRIPTION.
a.
Intended Use. The twin agent fire extinguisher is designed and constructed to be effective in fighting fires
generated by hydrocarbon fuels. It is intended for use in providing fire protection to the Tactical Airfield Fuel Dispensing
System (TAFDS) and the Amphibious Assault Fuel System (AAFS).
b.
Capabilities.
(1)
The fire extinguisher has the capability of extinguishing 100/130 aviation gas fires in 1500 square feet
berms (diked areas). It will do so using a 6% AFFF solution and a dry chemical (Purple K).
(2)
The extinguishers fire fighting capabilities are determined by its extinguishing agent, capacity, hose length,
and skill of the operator.
c.
Limitations.
(1)
The magnitude of the fuel tank fire is determined by the size and shape of the berm, wind velocity, and the
type of fuel. If the bladder tanks are installed too close together within the tank farms, a second tank, and probably all six
may ignite from the first fire; in this case all six tanks will be lost without additional fire fighting equipment. If the tanks
are installed and spaced as shown in figure 1-6, however, a single extinguisher will extinguish burning fuel in any single
20,000 gallon tank. This is contingent upon the extinguisher being placed as indicated in figure 1-6, and charged with a
dry chemical and a AFFF solution.
(2)
At least two, and preferably three, operators are required to fight a berm fire with this equipment. Although
only one operator will be manning the nozzle, the other operators are necessary to assist in dragging and maneuvering
the hoses, particularly when climbing or moving up and down the berm dikes. This is made necessary by the weight of
the combined 150-foot lengths of twinned handline, approximately 193 pounds. The two operators nearest the nozzle
A 1-2
|
