MIL-DTL-8789F
FIGURE 1. Minimum diameter of hose inner tube at the bulge.
4.9.3 Proof pressure test. Each hose assembly shall be tested in accordance with ASTM D380 and
subjected to the applicable proof pressure listed in table II. Each hose assembly shall meet the
requirements of 3.6.2. The test fluid shall be water or fluid in accordance with MIL-PRF-5606,
MIL-PRF-83282 or MIL-PRF-87257.
4.9.4 Leakage test. Two unaged hose assemblies shall be tested as specified in ASTM D380 and
meet the requirements of 3.6.3. The following details shall apply:
a. The samples shall be a minimum of 12 inches (30.5 cm) in length.
b. Test fluid shall be water or hydraulic fluid in accordance with MIL-PRF-5606, MIL-PRF-83282 or
MIL-PRF-87257.
c. Samples shall be subjected to 70% of the minimum burst pressure as specified in table II and
held for 5 minutes.
d. After 5 minutes, the pressure shall be released and reduced to zero. Then the pressure shall be
raised again to 70% of the minimum burst pressure and held for another 5 minutes.
e. The adjacent outer cover shall be carefully inspected during this period for any wicking or
leakage of the test fluid.
f. After completion of the leakage test on these samples, they shall be subjected to the burst
resistance test specified in 4.9.5.
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