A-A-51249
Defects (continued).
Cassette does not rest evenly on a flat surface.
Cassette not free of burrs and sharp edges.
Cassette finish not free of chips, cracks, scratches, and other appearance defects.
Cassette not clean and free of dirt, oil and grease.
Sampling for tests. Sampling for tests including dimensional test, shall be conducted in accordance with MIL-STD-105, with an AQL of 2.5 (percent defective) and an inspection level of S-1. The unit of product for test purposes shall be one radiographic film cassette.
Tests.
Test shall be conducted to determine compliance with specification requirements. test radiographs shall be made at a focal spot to film distance of 40 ± 1 inch, at 80 Kvp, with screen-type, medium speed x-ray film. The x-ray rube shall be perpendicular to the center of the cassette. The nominal focal spot size of the x-ray tube shall not be more than 1.0 mm. A minimum of 2.3 mm of aluminum filtration shall be in the useful beam. The exposed x-ray film shall be developed in accordance with the manufacturer’s instructions. The developed x-ray film shall be viewed with an unaided eye using a fluorescent type x-ray film illuminator.
Drop test.
The selected sample shall be dropped on each corner from a height of 30 inches onto a concrete tile floor. The cassette shall be dropped so that the plane of the cassette is perpendicular to the floor and the center of gravity of the cassette is directly over the corner which strikes the floor. Except for deformation at the impacted corner area, the cassette shall show no other sign of damage. Any other kind of damage will constitute a defect. After the drop test, the sample cassette shall be subjected to and pass the flatness test, lightproof test, and film contact test.
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