MIL-PRF-2940D
3.4.6 Pressure integrity. The snubber under test shall withstand the
pressure specified in 4.6.6 without showing any evidence of leakage or damage.
Upon completion of the pressure integrity test, the snubber under test shall
meet the dampening requirement of 3.4.2.
3.5 Cleaning and surface finishes. Surfaces of castings, forgings,
molded parts, stampings, machined, and welded parts shall be free of defects
such as cracks, porosity, undercuts, voids, and gaps as well as sand, dirt,
fins, sharp edges, scale, flux, and other harmful or extraneous materials.
External surfaces shall be smooth and edges shall be either rounded or
beveled. There shall be no burn-through. There shall be no warpage or
dimensional change due to heat from welding operations. There shall be no
damage to adjacent parts resulting from the welding.
4.
VERIFICATION
4.1 Classification of inspections. The inspection requirements
specified herein are classified as follows:
(a)
First article inspection (see 4.2).
(b)
Conformance inspection (see 4.3).
4.2 First article inspection. First article inspection shall be
performed and passed prior to production and shall be witnessed by a
Government inspector. First article inspection shall be performed on samples
which have been produced with equipment and procedures normally used in
production. First article inspection shall consist of the examination and
tests specified in table I and in the sequence listed.
4.2.1 Sample size. Two snubber samples of each type, class,
composition, and end connection shall be subjected to the first article
inspection.
TABLE I.
Inspection, examination, and tests.
Test
First article
Conformance
Inspection
Requirement
procedures
inspection
inspection
Examination
3.2, 3.3, 3.5
4.5
X
X
Steady state
3.4.1
4.6.1
X
-
transmission
Dampening
3.4.2
4.6.2
X
X
Temperature
3.4.3
4.6.3
X
-
Vibration
3.4.4
4.6.4
X
-
Shock
3.4.5
4.6.5
X
-
Pressure
3.4.6
4.6.6
X
X
integrity
4.3 Conformance inspection. Conformance inspection shall be performed at
the place of manufacture. Conformance inspection shall consist of the
examination and tests specified in table I and shall be witnessed by a
Government inspector.
4.3.1 Lot. A lot shall consist of all snubbers of the same type,
class, composition, and end connection manufactured at one time.
4.3.2 Sampling
for conformance inspection. A random sample of snubbers
will be selected by a
Government inspector from each lot of snubbers (see
4.3.1 for conformance
inspection (see 6.4). Sample size shall be in
accordance with table
II.
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