MIL-DTL-81581/6B
proof assembly. This test procedure shall be repeated 10 times. During each cycle, the hose
assembly shall meet the requirements specified in 3.5.1.1.
4.3.1.2 Leakage. The disconnect of the hose assembly shall be fully engaged with the
specified proof assembly, and the other end of the hose assembly shall be capped. The hose
assembly shall then be subjected to the test procedure specified in 4.6.9.3 Leakage - procedure
III of the general specification and shall meet the requirements specified in 3.5.1.2.
4.3.1.3 Flow check (hose assemblies with Drawing 289AS100 quick disconnect). A static
pressure of 150 + 5 psig shall be applied against the check end of the disengaged quick
disconnect of the hose assembly for a period of 3 minutes. The hose assembly shall meet the
requirements specified in 3.5.1.3.
4.3.1.4 Pressure drop. The quick disconnect of the hose assembly shall be fully engaged
with a proof assembly. Inlet pressures of 40, 50, 70 and 90 psig shall be applied to the complete
assembly and flows shall be varied at each inlet pressure from zero to 120 liters per minute (lpm)
at normal temperature and pressure (NPT) in 10 lpm increments The pressure drop through the
complete assembly shall meet the requirements specified in 3.5.1.4.
4.3.1.5 Quick disconnect endurance. The disconnect of the hose assembly shall be cycled
1,000 times. The engagements and disengagements shall be conducted at the rate of one cycle
per three seconds using the specified proof assembly. A cycle shall constitute one complete
engagement and disengagement, and the locking collar of the disconnect assembly shall be given
a random turn just prior to each disengagement. For hose assemblies with Drawing 289AS100
quick disconnect, the first 500 cycles shall be conducted with 70 + 5 psig supply pressure against
the check of the quick disconnect. Upon completion of the first 500 cycles, the hose assembly
shall be subjected to the following tests from the general specification:
a. Polarity (color code) and electrical continuity, Procedure I
b. Leakage, Procedure III
c. Flow check (hose assembly, Drawing 33D1349)
If the hose assembly meets the requirements of the preceding tests, then endurance shall be
continued without the 70 + 5 psig applied against the check of the quick disconnect. When the
endurance test has been completed, the above tests shall again be conducted. The hose assembly
shall meet the requirements specified in 3.5.1.5.
4.3.2 Group II hose assemblies.
4.3.2.1 Flow check (Drawing 286AS100). A hydrostatic pressure of six feet of water shall
be applied in the direction of normal flow of the disengaged female end connector of the hose
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