MIL-DTL-25579G
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein shall be classified as follows:
a. Qualification inspection (see 4.2)
b. Conformance inspection (see 4.3)
4.1.1 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities
of sufficient accuracy, quality and quantity to permit performance of the required inspection shall be used.
The establishment and the maintenance of a calibration system to control the accuracy of all tests and
measuring equipment shall be in accordance with ISO 17025 and NCSL Z540.3 as applicable.
4.2 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the
Government qualifying activity (see 6.3) on sample units produced with equipment and procedures used in
production.
4.2.1 Samples for qualification. Test samples shall consist of the number of samples and lengths specified
in table VII. If field-attachable fittings are used, the fittings shall comply with MIL-DTL-27272 and be used with
MIL-DTL-27267 hose. Where permanent end fittings are used and more than one source of hose or hose liner
are used, qualification tests shall be conducted on test samples constructed using hose liner from each source.
Where permanent fittings using hose other than MIL-DTL-27267 hose, then hose liners and fittings from each
source are used.
4.2.1.1 Specific gravity. The requirements of 4.5.18 (specific gravity in accordance with SAE-AS2078) shall
be demonstrated by the tests.
4.2.1.2 Qualification test sequence. The test sequence used shall be as specified in table VII. See
paragraph 3.5.1 for inner tube requirements.
4.2.1.3 Qualification samples.. Qualification samples shall be representative of the product proposed to be
furnished to this specification. Samples consisting of 16 hose assemblies of the same size and class, with
lengths as specified in table VII or in the applicable test method, shall be subjected to qualification testing.
Each sample shall consist of a PTFE lined, wire reinforced hose, qualified to MIL-DTL-27267, coupled with
reusable fittings as specified 3.5.2.
a. Reusable fittings. All assemblies with reusable fittings shall be assembled in accordance with the
instructions specified in MIL-DTL-27272. When permanent fittings are used in the hose assemblies,
two separate end fittings of the same type of interface, size, and class shall also be submitted for
qualification testing (see table VII).
b. Permanent fittings. Hose assemblies with permanent fittings shall be qualified with fittings from a
specific manufacturer(s) and bulk hose from a specific manufacturer(s).
c. Both reusable and permanent fittings. For assemblies with either permanent or reusable fittings, the
assemblies shall be qualified with fittings from a specific manufacturer and hose from a specific
manufacturer. If multiple hose sources and/or multiple fitting sources are involved, each combination
must be qualified. Any subsequent changes of a hose or fitting manufacturer in a qualified assembly
must be approved by the qualifying activity.
4.2.2 Additional samples for extension of qualification.
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