MIL-PRF-81542C
TABLE IV. Conformance examinations and tests.
Inspection
Requirement
Test Method
Weight
3.16
4.7
Stowage
3.17
4.8
Actuation pull force test
3.18
4.9
Pressure
3.19.1
4.11.1
Leakage
3.19.2
4.11.2
Visual examination
3.4-3.13, 3.22
4.6
4.5 Inspection conditions for leakage testing.
4.5.1 Atmospheric conditions. Unless otherwise specified in the contract, all
pressure/leakage tests required by this specification shall be conducted at a barometric pressure
of 28 to 32 inches of mercury and at a temperature of 77 +18 F (25 +10 C). If the final values
of the ambient temperature or barometric pressure at the end of the four-hour leakage inspection
are different from the initial values recorded at the start of the inspection, the following
corrections should be made to the final pressure readings in psig (see 4.5.2 and 4.5.3).
4.5.2 Temperature correction. For each degree Fahrenheit rise in temperature, 0.031 psig
shall be subtracted from the final pressure reading. For each degree Fahrenheit drop in
temperature, 0.031 psig shall be added to the final pressure reading. The corresponding
correction per degree Celsius is 0.056 psig.
4.5.3 Barometric pressure correction. For each 0.1 inch of mercury rise in barometric
pressure, 0.049 psig shall be added to the final temperature-corrected pressure reading. For each
0.1 inch of mercury drop in barometric pressure, 0.049 psig shall be subtracted from the final
temperature-corrected pressure reading.
4.6 Visual examination. The visual examination shall be performed to verify conformance
to the requirements specified in section 3. Table V classifies and enumerates the defects.
4.7 Weight. The weight of the life raft shall meet the requirements of 3.16.
4.8 Packaging for stowage. The raft in its packed configuration for stowage shall meet the
requirements of 3.17.
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