MIL-PRF-62048C
water) while being fed coarse grade dust at the variable air flows specified in figure 1
(see 4.5.3.4).
3.4.11 Surface treatment. Cleaning, pretreatment, priming and painting shall conform to
an appropriate CARC paint system selected from drawing number 1236900. Color of paint top
coat shall be as specified in the acquisition document. Corrosion protection of materials shall be
equal to or exceed that provided by hot dip galvanized 1020 steel, with coating thickness in
accordance with ASTM A123 with zinc phosphate pre-treatment. The proposed material shall
be compared to a galvanized sample (as described above) using Accelerated Corrosion Test GM
9540P Method B until one of the items fail with defects such as extensive corrosion at scribe or
significant penetration of base metal (see 4.5.2).
3.4.12 Environmental.
3.4.12.1 Vibration. The air cleaner shall be capable of meeting the performance
requirements of 3.4.6 and 3.4.9 after withstanding simple harmonic motion having a double
amplitude of 0.08 cm (0.13 inch) for 12 hours in the vertical direction and 6 hours in each
horizontal direction with a 60 second sweep of 10 and 55 hertz. Without cleaning the element,
vibration resistance testing shall be conducted using elements loaded to dust capacity per 3.4.9
(see 4.5.4.1).
3.5 Identification and marking. Identification and marking shall be permanent and
legible and shall include, as a minimum, the manufacturer's CAGE code, the Engineering
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drawing part number, and the maximum rated airflow capacity in m /min. (cfm) (see 4.5.2).
3.6 Workmanship. Workmanship shall be such that the air cleaner shall be free of burro,
sharp edges, surfaces out of alignment or out of contour (visually apparent), loose metal particles
or other foreign materials. Sheet metal parts shall be free of pipes, laminations, stringers, tears,
and excessive metal thinning at drawn sections (see 4.5.2).
4. VERIFICATION
4.1 Classification of inspect ion. The inspection conditions specified herein are
classified as follows:
a. First article inspection (see 4.2).
b. Conformance inspection (see 4.3).
4.2 First article inspection. Unless otherwise specified (see 6.2), first article inspection
shall be performed on preproduction or initial production samples on each of the four samples
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