TM55-1500-345-23
(5) Ample fire extinguishers of the foam,
(6) Wash thoroughly after painting and
dry chemical, or carbon dioxide type will be pro-
before eating, and do not carry food into spraying
vided.
areas.
(7) Spray paint only when adequate ex-
haust or general ventilation is available.
WARNING
Containers of paint may develop inter-
(8) Personnel having histories of skin or
nal pressure during storage and should
respirator ailments should be excluded from
be opened cautiously.
paint crews applying two component polyure-
thane or epoxy paints. When there is doubt, ap
Opening of Containers. Paint containers
c.
propriate medical tests must be administered.
may develop internal pressure due to storage at
high temperatures or by development of gas due
(9) Individuals who engage in mixing or
to deterioration. This condition may be detected
applying plural component paints containing iso-
by a bulging of light gage steel drums. Containers
cyanates will be subjected to appropriate pre-
must be opened slowly to allow the pressure to
placement surveillance and periodic job related
escape before completely removing the seal.
medical tests.
NOTE
Fire Precautions. Most aircraft paints con-
b.
tain highly flammable constituents, which, under
Failure to follow this procedure may
suitable conditions, can form explosive mixtures
result in paint being spattered on per-
with air. As a result, the following precautions
sonnel and surrounding areas.
shall be taken:
(1) Open containers, sealed with bungs,
(1) Electric motors used to drive exhaust
by slowly turning bung out until a hissing sound is
fans or other equipment in storage places shall be
heard. When hissing stops (an indication that
of the type approved for explosive atmospheres. If
pressure in and out of drum is equal) completely
such motors are not available, substitutes shall
remove bung.
be located outside the room or building. Motor
housing, fan frames, and the like shall be properly
grounded to prevent possible static sparks, and
CAUTION
all electric wiring shall be enclosed in conduits.
Use a fine, nonspark-producing tool and
a soft-head hammer (rubber or plastic)
(2) All electric tights bulbs used within
to puncture drum.
storage area shall be enclosed in vaporproof
globes, mounted in keyless sockets.
(2) Containers which are bulged or dis-
torted due to internal pressure shall have a small
(3) Motor starting devices and switches
hole punctured in top to release pressure. After
In all electrical circuits, if not of the explosive-
pressure is released, container may be opened in
proof type and approved by an established elec-
usual manner.
trical underwriter, shall be located outside room
or building to prevent fire hazards from flammable
3-3. ATMOSPHERIC
CONDITIONS
FOR
vapors.
PAINTING.
Coatings normally should not be applied
a.
(4) Tools used to open containers shall
under unfavorable atmospheric conditions such
be nonspark-producing types. All eiectricaily-
as wind, strong drafts, dust, high humidity or ex-
driven portable tools used in this area shall be ex-
tremes of temperature.
plosion proof and properly grounded.
