MIL-DTL-5593E
4.6.2 Proof pressure (see 3.4.1). Hose and hose assemblies shall meet the proof pressure test in
accordance with ASTM D380 and meet the requirements of 3.4.1. The hose or hose assembly shall be
subjected to the applicable proof pressure specified in table I for not less than 60 seconds and not more
than 5 minutes.
accordance with ASTM D380. Two 3-inch lengths of hose shall be tested in accordance with the ring
specimen procedure of ASTM D380 using the Static-Mass Method.
4.6.4 Tensile strength.
4.6.4.1 Hose (see 3.4.3.1). The tensile strength of the inner tube and the outer cover shall meet the
requirements in 3.4.3.1 when tested in accordance with ASTM D380.
4.6.4.2 Hose assembly (see 3.4.3.2). The tensile strength of the hose assembly shall meet the
requirements in 3.4.3.2 when tested in accordance with ASTM D380.
4.6.5 Elongation (see 3.4.4). The ultimate elongation of the inner tube and the outer cover shall meet
the requirements of 3.4.4 when tested in accordance with ASTM D380. Test shall be performed at the
time of conducting the tensile test (see 3.4.3).
when subjected to the burst pressure test in accordance to ASTM D380. The following details shall
apply:
a. Test sample hose: An 18-inch (45.7 cm) length of hose shall be tested.
b. Hose assembly shall be subjected to pressure and the pressure increased until burst of the
assembly occurs.
c. Pressure shall be applied with a rate of pressure rise of 300 psig to 1,000 psig (20.68 bar to
68.945 bar) per minute.
d. The test sample shall be observed throughout the test and the type of failure and the pressure at
which it occurred shall be recorded.
4.6.7 Swelling (see 3.4.6). The outer and inner tubes shall be immersed in test fluids in accordance
with ASTM D471 and shall meet the requirements of 3.4.6. The following details shall apply:
a. Three test samples from the outer cover shall be immersed in fluid in accordance with ASTM
D471 reference fuel A at room temperature for 24 hours.
b. Three test samples from the inner tube shall be immersed in fluid accordance with ASTM D471
reference fuel B at room temperature for 24 hours.
c. At the end of the immersion period, the samples shall be removed from the fuel and the change in
volume shall be determined within 5 minutes in accordance with ASTM D380.
4.6.8 Flexibility (see 3.4.7 ). Hose when subjected to the flexibility test shall meet the requirements of
3.4.7. The following details shall apply:
a. A 12-inch (30 cm) length of hose shall be placed vertically in a vise.
b. The lower end of the hose shall be gripped with a vice or other suitable device and a weight equal
to the amount specified in table VI attached to the opposite end.
c. The hose shall flex significantly to allow the weighted end to drop to a position not less than the
fixed end.
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