MIL-PRF-16552F
4.2 First article inspection. First article inspection shall consist
of the examination of 4.6 and tests specified in Table II. The tests
specified shall be performed on each size filter.
TABLE
II.
Test Agenda.
Verifi-
Tests
Requirements
cation
First Article
Conformance
Periodic
Resistance
3.12.1
4.6.1
All
All
All
Arrestance
3.12.1
4.6.2
All
-----
-----
Dust Loading
3.12
4.6.3
All
-----
All
Cleanability
3.13
4.6.4
All
-----
-----
Shock Corner
3.10
4.6.5
All
-----
-----
Drop Test
Composite
3.2.1
4.6.6
First
-----
First
Material
Production
Production
Unit
Unit
Permeability
3.2.4
4.6.7
All
-----
-----
Strength
3.8.b
0
First
-----
-----
Production
Unit
4.3 Conformance inspection. Conformance inspection shall consist of
the tests as specified in Table II. The tests specified shall be performed on
each size filter. Any unit which fails to meet any specified requirements
shall be rejected.
4.4 Periodic conformance inspection. Periodic
tests are required to
ensure continuing satisfactory operation of identical
units. The tests are
required under any contract or purchase order for air
filters of existing
design when the invitation to bid is dated 4 years or
more subsequent to the
date of the last previous test of an identical unit.
Periodic tests shall
consist of the tests specified in Table II.
4.5 Composite material. Filters constructed of composite material
shall meet the material requirements of 4.6.6.
4.6
Tests.
Tests shall be conducted in accordance with 4.6.1 through
4.6.7.
4.6.1
Resistance. Resistance shall be determined in accordance with
ASHRAE 52.1-1992, resistance versus air flow measurements.
4.6.2
Arrestance. Arrestance shall be tested in accordance with
ASHRAE 52.1-1992, determination of synthetic dust weight arrestance.
4.6.3
Dust loading. Dust loading effects shall be tested in
accordance with the requirements for disposable and non-renewable filters of
ASHRAE 52.1-1992.
4.6.4
Cleanability. Cleanability shall be determined after the filter
is loaded with dust in accordance with 4.6.3. Cleaning shall be by means of a
2
stream of hot water at a pressure of 60 to 80 pounds per square inch (lb/in ).
If cleaning by this means reduces the resistance to air flow to within 0.01
inch water gauge of its initial value, with the filter unoiled both before and
after the test, the specimen shall be considered acceptable in regard to
cleanability.
6
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