MIL-DTL-8794F
4.8.6 Proof pressure (see 3.5.3). All hose assemblies shall be proof pressure tested in accordance
with ASTM D380 and shall meet the requirements of 3.5.3. The following details shall apply:
a. Hose assembly shall be unaged.
b. Hose assemblies shall be subjected to the hydraulic proof pressure, except -3 to fuel proof
pressure, specified in table II for a period of not less than 1 minute.
c. The hose assembly shall show no evidence of leakage, burst, deformation, movement relative
to the hose, or separation from the hose.
4.8.7 Reduction in diameter test (see 3.5.4). The reduction in diameter test shall be conducted on a
length of hose 3 inches long that has been oil-aged (see 4.7.1.2) and shall meet the requirements of
3.5.4. The hose shall be measured at least 1/2 inch (12.7 mm) inside the hose from each end.
4.8.8 Impulse test (see 3.5.5). Size 4 through 32 hose assemblies when subjected to impulse testing
in accordance with SAE ARP603 shall meet the requirements of 3.5.5. Impulse testing of sizes -3, -40
and-48 is not required. The following details shall apply:
a. Six hose assemblies of the length specified in table II shall be subjected to hydraulic impulse
testing.
shall be unaged.
c. All hose assemblies shall be subjected to and successfully withstand the applicable hydraulic
proof pressure specified in table II prior to impulse testing.
d. Hose assemblies in sizes -4 through -32 shall be connected to a manifold and installed in an
impulse test machine that shall produce dynamic impulses in the manifold of the magnitude
and frequency required by SAE ARP603.
e. For hose assemblies -4 through -16 the peak pressure shall be 125 percent of the hydraulic
operating pressure specified in table II. Hose assemblies in size -20 through -32 shall be
subjected to a peak pressure of 100 percent of the hydraulic operating pressure specified in
table II.
f In all cases, the backpressure shall be a maximum of 75 psi.
g. There shall be no evidence of leakage or separation of the adapter from the hose.
h. Any retightening of adapters or other maintenance on the adapters or hoses during this test
shall be recorded.
i. The fluid used for this test shall conform to either MIL-PRF-5606, MIL-PRF-87257, or MIL-PRF-
83282, except that the test fluid may contain up to 25 percent by volume of lubricating oil
conforming to SAE J1966, grade 50.
(1) The fluid shall be held to a temperature of 120°F ±10°F (49°C ±5.6°C) measured at the
test manifold.
j. Hose sizes -4 through -12, when installed on the impulse test machine, shall be bent into a "U"
shape with a bend radius as specified in table II.
k Hose sizes -16 through -32 may be installed straight.
l. Both ends of the bent hose assembly shall be connected to a rigid support and one end of the
straight hose assembly shall be free.
(1) Sizes -4 through -16 shall be subjected to 200,000 impulse cycles,
(2) Sizes -20 through -32 shall be subjected to 100,000 impulse cycles.
m. There shall be no evidence of leakage or separation of the hose from the adapter.
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