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Table A 3-1. Preventative Maintenance Services (Continued)
FREQUENCY
MAINTENANCE CHECK
CRITERIA
Bi-Annually
Annually
X
Check for signs of un-
Unauthorized weld-
authorized repairs to
ing to an ASME
the tanks (such as
tank is cause for
makeshift welds or
replacement.
brazing.
X
Fully unwind the hand
hose lines and check
thoroughly for signs of
If hose shows
wear, abrasions, or
signs of damage,
deformity.
replace it.
.X.
Check hose couplings for
tightness, corrosion or
cracks.
X
Check tank mounting for
Replace mounting
tightness.
bolts if severely
corroded.
X
AFFF HEATER.
1. Cold Weather Check.
(ambient temperature less
than 40°F).
a. Ensure power has been
applied to heater a min-
imum of 4 hours.
b. Immerse a thermometer
in AFFF liquid for 3
AFFF temperature
minutes.
above 40
F.
X
2. Warm weather check
(Ambient temperature
above 50
F).
a. Measure resistance
with ohmmeter between
each power lead to
ground. See figure 2-3
for schematic.
Infinity
A 3-4
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