MIL-DTL-27267D
3.5.3.6 Room temperature burst pressure. When subjected to testing in accordance with 4.6.3.6, the
hose assembly shall not leak or burst below the applicable room temperature burst pressure specified in
table III. There shall be no leakage around the end fittings. The end fittings shall not loosen or separate
from the hose.
3.5.3.7 High temperature burst pressure. When subjected to testing in accordance with 4.6.3.7, the
hose assembly shall not leak or burst below the applicable high temperature burst pressure specified in
table II. There shall be no leakage around the end fittings. The end fittings shall not loosen or separate
from the hose.
3.5.3.8 Low temperature flexibility. When tested in accordance with 4.6.3.8 and subjected to the
applicable inside bend radius specified in table II, the hose assembly shall not leak or exhibit any visual
evidence of permanent deformation or damage.
3.5.3.9 Vacuum. The hose shall not collapse or show any evidence of defects when subjected to
testing in accordance with 4.6.3.9. The ball shall roll freely through the entire length of the hose, unaided,
to indicate that the inside diameter of the hose has not been distorted or reduced.
3.5.3.10 Volumetric expansion. The volumetric expansion, measured in cc/in of free length, shall not
be greater than .028 inch (0.71 mm) for size 4 and .040 inch (1.02 mm) for size 5 when tested in
accordance with 4.6.3.10.
3.5.3.11 Leakage. There shall be no leakage through the wall of the hose and around the fittings
when the hose assembly is tested in accordance with 4.6.3.11.
3.5.3.12 Fuel resistance. When subjected to testing in accordance with 4.6.3.12, the hose assembly
shall not leak or show any evidence of deterioration during and at the completion of the test.
3.5.3.13 Corrosion. When subjected to testing in accordance with 4.6.3.13, the hose assembly shall
not leak or malfunction when subjected to the applicable room and high temperature burst pressures
specified in table II.
3.5.3.14 Pneumatic leakage. When subjected to testing in accordance with 4.6.3.14, a steady stream
of bubbles shall not be seen from any area on the hose assembly.
3.5.3.15 Pneumatic effusion. When subjected to testing in accordance with 4.6.3.15, the measured
effusion rate of the hose assembly shall not be greater than the values listed in table VI.
TABLE VI. Pneumatic effusion requirement.
Size
-4
-5
-6
-8
-10
-12
-16Z
-20Z
-24Z
Effusion rate 1/
4.0
5.0
5.0
5.0
5.0
6.0
8.0
8.0
8.0
(cc/ft of hose)
1/ Collected during the last 30 minutes of the test.
3.5.3.16 Pneumatic surge. When subjected to testing in accordance with 4.6.3.16, the hose
assembly shall not leak through the hose wall and around the end fittings. The inner tube of the hose
shall not exhibit any evidence of degradation when the filter is examined at the completion of the test.
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