MIL-DTL-8788F
4.7.7 Burst pressure test (see 3.5.5). Hoses when subjected to the burst pressure test shall meet the
requirements of 3.5.5. Burst shall be tested in accordance with ASTM D380. The following details shall apply:
a. Two unaged hose assembly samples shall be subjected to the burst pressure specified in
b. Length: In accordance with ASTM D380.
c. Test fluid shall be water or fluid conforming to MIL-PRF-5606, MIL-PRF-87257, or
MIL-PRF-83282.
d. The rate of pressure rise shall be 25,000 psi +0/-10,000 psi (1723.69 bar +0/-689.48 bar) per minute.
e. During this test, the hose shall be fastened at one end fitting to the pressure source while the other
end shall be extended straight, and the free end shall not be restrained or fastened in anyway.
f. The actual pressure at which the samples burst or otherwise fail shall be recorded.
4.7.8 Impulse test (see 3.5.6). Hose samples shall be subjected to impulse testing in accordance with
SAE AS603 and shall meet the requirements of 3.5.6. The following details shall apply.
a. Four samples of the length specified in table I, shall be subjected to the proof pressure test (see
4.7.3), prior to impulse cycling.
b. Two of the four samples shall be air aged (see 4.6.4.1) and the other two shall be oil aged (see
4.6.4.2).
c. The pressure used for impulse testing shall be operating pressure specified in table I. Impulse
cycles shall be specified in table VI.
d. Only size 16 hose shall be tested without surge peaks and in a straight position with one end free.
e. Test fluid shall be in accordance with MIL-PRF-5606, MIL-PRF-87257, or MIL-PRF-83282.
f. The fluid temperature, measured at the manifold, shall be held at +120°F ±20°F (48.89°C ±11.11°C).
TABLE VI. Impulse cycles.
Hose
Maximum impulse cycles
Minimum impulse
Minimum average impulse
size
that can be used to
cycles 1/
cycles per hose
dash
compute average 2/
number
-4
100,000
---
---
-5
100,000
---
---
-6
100,000
---
---
-8
75,000
100,000
150,000
-10
50,000
75,000
100,000
-12
35,000
50,000
70,000
-16
45,000
55,000
75,000
1/ The average of the test samples shall not be below the values listed in this column.
2/ When test samples impulse cycles are averaged, the maximum cycles that may be used to compute
the average shall not exceed the figures given in this column. This column is giving a limit to the
number of impulse cycles that are allowed to calculate the average. While testing is in progress the
test operator will take a reading of the impulse cycles completed. If it's higher than the value in
column 4 the test operator would use the value specified in the table not the higher (true) value
from the reading.
15
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business