 |
|||
|
Page Title:
Determination of moisture content |
|
||
| ||||||||||
|
|  MIL-P-18714D
4.5.1 Lot formation. Unless otherwise specified in the contract or purchase order (see 6.2), production lots
shall consist of not more than 20,000 homogeneous primers plus those required for inspection (see 4.5.2).
Each production lot shall contain only one Class 2 black powder lot and one Class 4 black powder lot and only
one tubing heat treat lot.
4.5.2 Inspection. Unless otherwise specified in the contract or purchase order (see 6.2), 105 samples shall
be selected at random from each production lot for test and examination in accordance with the quality
conformance inspection plan of table I. This sample is in addition to those primers required for contractor
inspection and tests.
4.6 Classification of characteristics. The characteristics verified by the tests and examination herein are
classified as critical, major, or minor in accordance with DOD-STD-2101. Requirements for critical
characteristics are identified by the symbol (C) and major characteristics by the symbol (M). The number
following the classification symbol indicates the serial number of the characteristic. Requirements not
annotated with a classification code are classified as minor.
4.7 Methods of inspection.
4.7.1 Radiographic. The primer shall be subjected to a radiographic inspection in accordance with MIL-
STD-453. The primer shall be mounted in the vertical position with the primer stock up and X-rayed
perpendicular to its axis, focused at a point 0.6 + 0.2 inch from the stock face. Any primer which meets the
requirements of 3.3 but appears to have been misassembled shall be subjected to detail strip and shall meet
the requirements of 3.5.
4.7.2 Determination of moisture content. Moisture analysis procedure for the black powder shall be as
follows:
a.
Ten grams (10.0 g) of black powder from each sample primer shall be tested in the granular form
for moisture content.
b.
The black powder shall be removed from primer tubes and placed in a dry container with a tight
cover. Black powder shall not be exposed to the atmosphere for more than 3 minutes.
c.
Sample containers must be covered and placed in a desiccator until ready to test the moisture
content.
Carefully weigh 2.0 + 0.1 g of sample into a tared weighing dish or container. The sample shall be
d.
weighed to the nearest 0.1 mg. Black powder shall not be exposed to the atmosphere for more than
3 minutes.
e.
Uncovered samples shall then be placed in an oven at 70 to 75C. Do not draw vacuum.
f.
After 4 hours minimum (4 1/2 hours maximum), remove samples from oven, cover, and place in a
7
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals