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Periodic in-process production inspection |
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| MIL-E-82756(OS)
single batch. A batch shall be defined as in 6.4.1. Failure of any test result or examination to meet any
requirement of this specification shall be cause for rejection of the lot.
4.5.1 Periodic in-process production inspection. Unless otherwise specified in the contract or
purchase order (see 6.2), a sample of mixed plasticizer shall be taken once per month and subjected to the
test given in 4.6.4. Failure to meet the requirements of that test shall be cause for rejection of the batch
and shall require repeating the periodic in-process tests on the next batch.
4.5.2 Sampling for cured explosive. After addition of all ingredients, thorough mixing, and removal
of the mixing agent, a sample shall be taken from each lot and ladled into a CAPLUG number 1120, or
equivalent container, until the container is full. This sample shall be cured under the same temperature
and cure conditions as the explosive-loaded ordnance item. The sample shall be prepared for testing as
follows:
a.
The test specimens for the tensile test of 4.6.5.1 shall be cut from the center of the cured
sample. The tests specified in 4.6.1 (or 4.6.2), 4.6.6, and 4.6.7 shall be run on the remaining
two pieces.
b.
The test specimens for 4.6.5.2 shall be cast into an appropriate mold, and the tests specified
in 4.6.1 (or 4.6.2), 4.6.6, and 4.6.7 shall be run on the casting after the test specified in
4.6.5.2 has been performed.
4.5.3 Sampling for uncured explosive. After addition of all ingredients, thorough mixing, and
removal of the mixing agent, a sample shall be taken from each lot and placed into a non-porous container.
The sample shall be subjected to testing in accordance with 4.6.3 and 4.6.4.
4.6 Test procedures. The subsequent procedures shall be used to determine that the requirements of
this document have been met. Any proposed change in test procedures or equipment shall necessitate,
before adoption, prior approval of the contracting activity. In case of dispute between the results from any
proposed method or equipment and what is cited herein, the results using the methods and the equipment
specified in this specification shall prevail. Unless otherwise specified, all tests shall be run in duplicate.
The average of the two results shall be taken as the test result.
4.6.1 Cured PBXN-103 ingredient analysis. The chemical composition of the cured PBXN-103
shall meet the requirements of table I when tested by the methods described in 4.6.1.1 through 4.6.1.7 or in
4.6.2.
4.6.1.1 Sample preparation. Cut the sample from 4.5.2 into thin slices with a knife. Accurately
weigh a 5-gram sample to 1 mg, place in an extraction thimble, and extract with methylene chloride in a
soxhlet extraction apparatus for 16 hours. Transfer the methylene chloride extract to a 500-mL separatory
funnel, and extract with two successive 50-mL portions of 5 percent sodium carbonate solution.
4.6.1.2 Resorcinol. Determine the resorcinol content by measuring the absorbance of the sodium
carbonate solution at 288 millimicrons () with a Beckman DK-2 Spectrophotometer, or an equivalent
instrument, using the following procedure:
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