MIL-DTL-6060E
4.4 Performance testing.
4.4.1 Seam strength. Heat-sealed seam test specimens from bags shall be tested in
accordance with MIL-STD-2073-1, Appendix G. Six specimens, 1 by 2 1/2 inches cut
perpendicular to the specified seams shall be tested from the following locations:
a. One specimen from a point one inch below the open end of each vertical seam.
b. Three specimens from random points along each vertical seam.
c. Two specimens from random points along each horizontal seam.
4.4.2 Double seam leakage. Identify each double-seam in the bag. A sample containing
each double-seam, 6 inches by 5 inches, shall be cut from the bag so that the double-seam is
centered within the specimen. Form the specimen into a pouch by heat-sealing along each 5-inch
edge. Pour a water solution containing dye into the pouch to a depth of two inches. Suspend the
pouch vertically for 15 minutes. Carefully pour off the dye solution and examine the outside of
the pouch for dye leakage at the double-seam. Each double-seam in the bag shall be tested.
4.4.3 Inspection window mounting integrity. The mounted window, including enough
surrounding barrier material to subsequently form a pouch, shall be removed from the bag. The
entire flat test specimen shall then be drawn completely around a rigidly mounted 2-inch
diameter mandrel while keeping the two side edges of the specimen aligned throughout the
procedure. Repeat this procedure three more times while rotating the specimen 90 degrees for
each test. Turn the specimen over and repeat these tests with the opposite face of the material
next to the mandrel. The test specimen shall then be folded along the largest dimension with the
interior of the window mounting on the inside. Form the specimen into a pouch by heat sealing
the barrier material along the smaller edges. Pour dye solution into the pouch to a level one inch
above the uppermost edge of the window mounting. Suspend the pouch vertically for 15
minutes. Remove the dye solution and examine the window mounting area for leakage.
4.4.4 Gasket mounting integrity. A section of the bag containing a gasketed mounting hole
shall be removed from the bag to form a test sample that also includes enough surrounding
barrier material to subsequently form a pouch. The entire test specimen shall be drawn over a
mandrel in the same fashion and sequence as that specified in 4.4.3, except that the mandrel
diameter in this case shall be 5/8 inch. The sample shall then be incorporated into a simulated
floating bag assembly as shown on figure 1. The bolt shall be tightened until the gasket is evenly
compressed. A pouch shall then be formed from the surrounding barrier material. An air inlet
valve shall be installed in the barrier material prior to making the final seal. Slowly inject
compressed air into the test assembly until a minimum of 2 psi internal pressure is maintained.
Submerge the inflated test assembly in a tank of water and observe for any indication of gas
leakage which will be indicated by a steady stream or recurring succession of bubbles around the
gasketed mounting hole.
4.4.5 Thickness of gaskets. The thickness of the gaskets shall be measured in accordance
with MIL-STD-3010, Method 1003.
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