MIL-DTL-8794F
3.5.3 Proof pressure. Hose when as specified in 4.8.6, shall withstand the applicable hydraulic proof
pressures specified in table II without leakage or evidence of imperfections.
3.5.4 Reduction in diameter. Hose when tested as specified in 4.8.7, the ID of the hose shall not
3.5.5 Impulse test.
3.5.5.1 Impulse test (hose assembles of sizes -4 through -16). Hose assemblies sizes -4 through -16
when tested as specified in 4.8.8, shall withstand not less than 200,000 dynamic hydraulic impulse
cycles, at a nominal rate of 70 pulses per minute at 125 percent of the hydraulic operating pressure
specified in table II, without leakage, deformation, or separation from an adapter.
3.5.5.2 Impulse test (hose assembles of sizes -20 through -32). Hose assembles of sizes -20
through -32 when tested as specified in 4.8.8, shall withstand not less than 100,000 dynamic hydraulic
impulse cycles, at a nominal rate of 70 pulses per minute at 100 percent of the hydraulic operating
pressure specified in table II, without leakage, deformation, or separation from an adapter.
3.5.6 Collapse test (hose sizes -3 thrugh-10). Hose sizes -3 through -10 when tested as specified in
4.8.9, shall not collapse to less than the minimum clearance specified in table III. There shall be no ply
separation, blistering, or other damage, when subjected to an internal vacuum of 28 inches of mercury.
TABLE III. Minimum clearance for collapse test.
Clearance ±.001 inch
Hose size
(Dash No.)
(±0.03 mm)
inch (mm)
-3
.070 (1.78)
-4
.125 (3.18)
-5
.188 (4.78)
-6
.250 (6.35)
-8
.343 (8.71)
-10
.406 (10.31)
3.5.7 Bending and vacuum.
3.5.7.1 Bending and vacuum test (hose sizes -3 through -24). Hose sizes -3 through -24 when
tested as specified in 4.8.10, shall exhibit no more than an additional 10 percent reduction in OD the
hose, after bending to 180° at the minimum bend radius specified in table II at any section when an
internal vacuum of 28 inches of mercury is applied.
3.5.7.2 Bending and vacuum hose sizes -32 and larger. Hose sizes -32 and larger when tested as
specified in 4.8.10, shall exhibit no more than an additional 25 percent reduction in OD the hose, after
bending to 180° at the minimum bend radius specified in table II at any section when an internal vacuum
of 28 inches of mercury is applied.
3.5.8 Elongation and contraction (hydrostatic pressure test). Hose when tested as specified in
4.8.11, shall not change in length more than +2 or -4 percent at the applicable hydraulic operating
pressures specified in table II.
3.5.9 Corrosion resistance. When tested as specified in 4.8.12, the hose shall resist corrosion by
aqueous salt atmosphere.
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