MIL-DTL-85061C
TABLE VII. Vibration tests.
MIL-STD-810
Type of Equipment
Test procedure
Test category
Vibration exposure
Jet aircraft
I
12
Figure 514.6D-1
Propeller aircraft
I
13
Figure 514.6D-2
Helicopter
I
14
Figure 514.6D-3
Ground vehicles
I
20
Figure 514.6D-8
Marine vehicles
I
21
Figure 514.6D-9
4.5.7 Salt fog. Unless otherwise specified in the contract, the coupling assembly shall be
exposed to salt fog for 146 hours in accordance with MIL-STD-810, method 509.5. After 168
hours of exposure, the test specimen shall be examined for evidence of corrosion or other
damage of the finish. The proof pressure test shall be performed in accordance with 4.5.2. Any
leakage or failure shall cause for rejection of the coupling test assembly.
4.5.8 Flexure. The tubing on one side of the coupling test assembly shall be rigidly fixed
while the other tube shall be mounted eccentrically on a power driven spindle (see figure 3). The
test setup shall provide 0.5 degree flexure in any direction with an initial 3 degrees misalignment
between the tubing centerlines. MIL-PRF-7024 test fluid shall be introduced into the coupling
test assembly at a pressure of 12 PSIG. The test fluid temperature shall be maintained at +200°F
for the first 4 hour test period and -65°F during the second 4 hour period. The test assembly
shall be flexed for 8 hours at a minimum frequency of 60 cycles per minute. At the completion
of the test, a proof pressure test shall be conducted at a pressure of 250 PSIG and -65°F for 3
minutes. There shall be no evidence of leakage, rupture, permanent set, permanent deformation
or damage of any part of the coupling. Any leakage or damage of the coupling during the test
shall be cause for rejection of the test coupling.
4.5.8.1 Disassembly and inspection. Upon completion of the flexure test, the coupling
shall be disassembled and each part and tubing end examined. Any evidence of cracks, ruptures,
or any other structural deformation or failures of any coupling part shall be cause for rejection of
the test coupling.
4.5.9 Surge pressure.
4.5.9.1 Test setup. Two 2-inch couplings shall be assembled with three lengths of 2 inch
O.D. x 0.035 inch wall thickness (see table III) to make up a pressure surge cycle test assembly
(see figure 4). Two test assemblies shall be used as shown on figure 5.
a. The middle section of the tube assemblies shall be in the form of a capped or plugged
tee. One end of the assembly shall be capped and ported through the cap for connection of an
adapter to provide for filling of fluid and pressurization. The other end shall be capped and
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