MIL-PRF-87260B(USAF)
b. At the front, middle and end of each production run, the following tests shall be
conducted once on all products:
Color test (4.5.2)
(1)
(2)
Density test (4.5.3)
Porosity (air pressure drop) test (4.5.4)
(3)
(4)
Tensile strength and elongation tests (4.5.5)
(5)
Entrained solid contamination tests (4.5.14)
(6)
Steam autoclave exposure test (4.5.15) (See NOTE below)
(7)
Electrical resistivity (4.5.22)
NOTE: The steam autoclave exposure test specified in 4.5.15 shall be conducted only once for
each machine run to verify the hydrolytic stability characteristics of the material. If the bun
thickness is less than 8 inches, then the entrained solid contamination test specimen should be
stacked to get an 8-inch thickness.
4.4.2 Lot tests.
In addition to the production tests specified in 4.4.1, the compression load deflection test
(see 6.5.5) or 6-month interval, whichever occurs first. The results shall be maintained on file
for future reference.
4.4.2.1
Rejection and retest.
Failure of any of the test specimens to conform to the applicable requirements of 3.7 and
TABLE I shall require a retest of the property which failed on an additional set of test specimens
from the same test section or from the top of the adjacent bun. Additional testing will be
authorized by the qualifying activity in order to isolate the extent of defective material. In the
event of failure of any of the retested specimens, the material represented by those specimens
shall be rejected.
4.4.3 Process control tests.
In addition to the production and lot tests, the following tests shall be conducted on production
material at 12-month intervals, and the results maintained on file for future reference:
a.
Tear resistance test (4.5.6)
Volume swell in JP-5 (4.5.12)
b.
Fluid immersion (wet property tests) (4.5.16.3)
c.
Electrical resistivity permanence (4.5.20)
d.
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