MIL-DTL-26633E
TABLE II. Qualification inspection and tests.
Requirement
Inspection
Test
paragraph
paragraph
PTFE inner tubes
Density and relative density 1/
Tensile test and elongation
Tube rolling
Tube proof pressure
Hose assembly
Examination of products
Configuration
Cleanliness
Proof pressure
Leakage
Stress degradation 2/
Elongation and contraction
Burst pressure
Room temperature burst pressure
High temperature burst pressure
Impulse 3/
Tensile strength
Overtightening torque
1/ A representative cross sections of the PTFE tube (see SAE-ARP1153
and ASTM D792).
2/ Stress degradation (qualification test) - This test may be qualified due to similarity to
hose assemblies qualified and tested in accordance with SAE-AS1339, with the
approval of the qualifying activity.
3/ Impulse (qualification test) - This test may be qualified due to similarity
to hose assemblies qualified and tested in accordance with
SAE-AS1339, with the approval of the qualifying activity.
TABLE III. Qualification inspection requirements.
Sample number
Test
1
2
3
4
5
6
7
8
9
10
Examination of product
X
X
X
X
X
X
X
X
X
X
Configuration
X
X
X
X
X
X
X
X
X
X
Cleanliness
X
X
Proof pressure test
X
X
X
X
X
X
X
X
X
X
Leakage test
X
X
X
X
X
X
X
X
X
X
Elongation and contraction
X
X
Tensile strength
X
X
X
X
Burst pressure (room temperature)
X
X
Burst pressure (high temperature)
X
X
Overtightening torque
X
X
Stress degradation
X
X
Impulse
X
X
10
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