MIL-DTL-8789F
4.5.1 Samples for qualification. Qualification samples shall be representative of the products
proposed to be furnished to this specification. Samples shall consist of sufficient end fittings to permit the
fabrication of 10 hose assemblies of each size and of the lengths specified in table II. The samples shall
be hose in accordance with MIL-DTL-8788 and assembled with end fittings of the same size. Fittings
shall be qualified with hose from a minimum of two specific current qualified hose manufacturer(s).
4.5.2 Qualification inspection routine. Samples shall be subjected to qualification testing as specified
in table III in the sequence specified in table IV.
TABLE III. Qualification inspection.
Test
Requirement
method
Requirement
paragraph
paragraph
Examination of product
Bulge resistance
Proof pressure
Leakage
Burst resistance
Impulse
Low temperature flexibility
Over-tightening torque
TABLE IV. Qualification inspection sequence.
Sample number
Test
Required
method
qualification test
1
2
3
4
5
6
7
8
9
10
paragraph
Examination of product
X
X
X
X
X
X
X
X
X
X
Bulge resistance
X
X
X
X
Proof pressure
X
X
X
X
X
X
X
X
X
X
Leakage
X
X
Burst resistance
X
X
Impulse
X
X
X
X
Low temperature flexibility
X
X
Over-tightening torque
X
X
Proof pressure
X
X
4.5.3 Alternate qualification inspection criteria. Fittings shall meet the requirements of 4.5.2.
Alternatively, when the identical hose is manufactured and tested in accordance with MIL-DTL-8788, and
the identical hose assemblies are manufactured and tested in accordance with MIL-DTL-8790, using
identical fittings in accordance with MIL-DTL-8789, it is not necessary to test the fittings to meet the
qualification requirements of this specification. This applies when substantially identical test requirements
and test procedures are required for the assembly and the individual components and upon documented
approval by the qualifying activity.
4.5.4 Failures. One or more failures shall be cause for refusal to grant qualification approval.
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