FED-STD-793B
breathing tube, upon being stretched, shall show no
evidence of cracks or holes. The face mask, after being
subjected to light bending and twisting, shall show no
evidence of cracks or flaking. The head strap shall show
no signs of corrosion to metal parts, fraying of cloth
parts, or cracking of rubber parts.
5.3 FSC 4240 Industrial Gas Masks
Inspection plan:
Level S-2, SQL 4.0 percent defective.
Unit, intermediate, and shipping containers shall be secure
and free from damage. Markings on all containers shall be
securely attached, clear, and legible.
One end of the breathing tube assembly shall be subjected
to a pressure controlled air source with pressure regulator
set to furnish 10 inches of water with the other end of the
tube sealed tightly. The breathing tube assembly shall
then be submerged in water to test for leaks. No leaks
shall be permitted. As a condition for extending the shelf
life of the gas mask, the accompanying canisters shall be
replaced.
5.4 FSC 5640 Duct Tape
Inspection plan:
Level S-2, SQL 4.0 percent defective.
Unit, intermediate, and shipping containers shall be secure
and free from damage. Markings on all containers shall be
securely attached, clear, and legible.
The duct tape shall be visually examined for defects which
may impair usefulness. Adhesive remains active, tape does
not tear when unwound. If adhesion does not appear
adequate or if the tape strength appears compromised, test
one roll for adhesion and one roll for tensile strength.
Minimum adhesion shall be 40 ounces/inch width in
accordance with ASTM D3330, Procedure A. Minimum tensile
strength shall be 25 pounds/inch width in accordance with
ASTM D3759.
5.5 FSC 5970 Electrical Coating
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