13 MAR 1992
Foam Systems For Storage Tanks:
Assume gasoline storage.
( 9 ) , Para 3-2.5.1 or
Determine application rate.
( 9 ) , Para 3-2.4
foam duration time.
( 9 ) , Para 3-2.8.2
number of supplemental hose streams.
required foam quantity.
required water flow rate.
( 9 ) , Para 3-2.5.2 or
number of foam makers.
P u s h - b u t t o n actuation is preferable (foam
and water lines are brought to each tank
where deluge valves allow foam and water
to run through a proportioner and then to
Provide adequate number of hydrants.
Ensure hydrants and PIVs are at least 40 feet
f r o m buildings they protect.
P r o v i d e adequate sectional valves in
d i s t r i b u t i o n system.
Determine from flow test:
S t a t i c press.
Residual flow and press.
I f sprinklers are required, obtain test data
a s early as possible.
Can available supply meet water demand?
I f pressure is inadequate, provide booster
If volume is inadequate, this may be solved
b y increasing supply line sizes, looping
mains, and/or adding a water storage tank.
M u s t be diesel-powered unless installation
(4), Sec. 5.1.1
complies with Chapter 6 of NFPA 20.
NFPA 20, Para 7-1.1.1
C o n t r o l l e r s must be listed.
Flow meter required in addition to test
(4), Sec. 5.2.1
Remote alarms if not in constantly attended
( 4 ) , Sec. 5.2.4
(4), Sec. 5.3.2
I n d i v i d u a l press sensing lines for each