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 SECTION 6.
FOAM EXTINGUISHING SYSTEMS
6.1
FOAM EXTINGUISHING PUMPS: Foam extinguishing pumps
shall be designed in accordance with NFPA 20 (1987 edition).
6.2
SOLENOID OPERATED VALVES; All solenoid operated valves
shall be equipped with manual release or manual bypass.
6.3
ORIFICE PLATES: Orifice plates installed in pipelines
f o r purposes of reducing pressure are prohibited. Orifice plates used
for proportioning foam concentrate and water are allowed.
FOAM WATER DELUGE ( OPEN-HEAD) SYSTEMS: On Navy
6.4
projects, primary aircraft hangar protection shall be foam water
deluge (open-head) systems.
6.5
CLOSED-HEAD FOAM WATER SPRINKLER SYSTEMS: Closed-head
foam water sprinkler systems shall be pre-action type (i.e., for
flammable liquid warehouse, hazardous waste storage, etc.)
6.6
POL ABOVEGROUND STORAGE TANKS: Foam extinguishing
systems for POL aboveground storage tanks shall employ "over-the-top"
application using foam chambers.
FOAM PIPING MATERIALS: Foam piping materials to be
6.7
compatible with agent for long term use.
ELECTRIC EQUIPMENT in HANGARS: Electric equipment
6.8
beneath sprinkler systems in hangars shall be weather proof.
NEW FOAM WATER SYSTEMS:
All new foam water systems
6.9
shall use 3% concentration.
BLADDER TANKS: Bladder tanks shall not be used in foam
6.10
Use foam pumps and atmospheric tanks.
systems.
(14)
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