MIL-PRF-16552F
4.6.5
Shock corner drop test. The filter unit shall be subjected to
one free fall drop on each of two adjacent corners. The filter unit shall be
held by one corner and allowed to drop on the opposite corner. The impacting
corner shall fall 36 inches onto an unyielding concrete surface. The filter
unit shall show neither evidence of permanent damage nor distortion greater
than the following limits:
a. Flatness distortion of the frame in datum plane "B" of Figure 1 shall
not exceed 0.25 inch.
b. Perpendicular distortion of any corner shall not exceed 1 degree.
Filters made of composite materials shall meet the smoke obstruction (ASTM E-
662) test as follows:
Ds During 300 Sec (flaming)
6 (4 minutes)
Ds During 30 Sec (nonflaming)
1 (4 minutes)
Dmax (flaming)
81
Dmax (nonflaming)
32
and the Combustion Gas (ASTM-E-800) test as follows:
Combustion Gas
Flaming
Nonflaming
CO
75
10
CO2
2.0%
0.4%
HF
<1
<1
HC1
13
1
NOx
1
<0.5
SO2
<1
<1
HCN
1
<1
NH3
<3
<3
COC2
<0.1
<0.1
4.6.7
Permeability tests. A permeability test of nonmagnetic material
used in construction of the filter shall be conducted in accordance with DOD-
STD-2142, Test 501
4.6.8
Strength tests. The filter frame shall not be damaged or suffer
permanent distortion when subjected to a tensile force of 50 pounds
perpendicular to the longest filter side and parallel to the plane of the face
area of the filter. The force shall be applied to the handle and shall be
maintained for 20 seconds.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements
shall be as specified in the contract or order (see 6.2). When actual
packaging of material is to be performed by DoD personnel these personnel need
to contact the responsible packaging activity to ascertain requisite packaging
requirements. Packaging requirements are maintained by the Inventory Control
Point's packaging activity within the Military Department or Defense Agency,
or within the Military Department's System Command. Packaging data retrieval
is available from the managing Military Department's or Defense Agency's
automated packaging files, CD-ROM products or by contacting the responsible
packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may
be helpful, but it is not mandatory.)
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