|
| |
APPENDIX A
INSPECTION/MAINTENANCE
To Inspect/maintain the dry chemical and Halon
1211 extinguishers:
1.
Check that pointer on extinguisher pressure
gauge is in the GREEN operating range. (Upper
and lower point of operating range reflects the
operating
temperature
range
of
the
extinguisher.)
CAUTION: The operating pressure of the Halon
1211
extinguisher
varies
with
temperature. A Halon 1211
stored pressure extinguisher shall
be recharged if a loss in pressure
occurs, adjusted for temperature,
exceeding 10% of the charging
pressure. If a pressure loss is
suspected,
condition
the
extinguisher at 70 OF (21 OC) for
12 hours and then recheck the
pressure reading. If gauge still
shows a 10% pressure loss, the
extinguisher must be recharged.
2.
Check the visual inspection seal on metal ring
pin models. Check that the barb is intact on pull
pin models.
3.
If the extinguisher has a window (as shown) a
metal tab should extend through that window.
The tab restricts operating movement to protect
the valve stem. If the tab is bent or missing,
visually inspect the valve stem (by lifting the
operating
lever)
and
repair
or
replace
components as required.
4.
Inspect the hose and/or nozzle for damage or
obstructions.
5.
Weigh the extinguisher. The total charged
weight is printed on the nameplate. The
extinguisher shell should be checked for
damage or corrosion and treated as outlined in
NFPA 10.
6.
Record date of inspection/maintenance.
A8-5
|
