.125 inch thick. Recommended air pressure at the gun
barrier materials. For convenience, the exhaust may be
is 60 to 90 pounds.
attached to the outer terminus of one of the air circulation
ducts. The exhaust should be operated not only during
the spraying operations, but intermittently until the
9. Aluminum Coating. The bituminous coating must be
materials are dry. The fumes must be thoroughly
dry (usually 24 hr are needed) before the aluminum
exhausted from the completed package before the
coating is applied. The aluminum coating solution will
conform to type III MIL-C-3254.The coating should be
.002 to .003 inch thick. Recommended gun pressure is
11. Sensing Elements. Humidity sensing elements of
60 pounds.
an approved type will be placed as required within the
package at a height convenient reach with a ladder.
10. Fume Exhaust. An exhaust blower, powered by an
air motor or by an explosion-proof motor will be used to
exhaust hazardous fumes generated by spraying of the
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