MIL-DTL-26666G
4.6.3 Sampling and periodic inspection. Sampling and periodic inspections shall consist of the
inspections specified in table III and shall be made on test samples which have been subjected to and
passed the individual inspections (see table II).
TABLE III. Sampling and periodic inspections.
Requirement
Inspection
Sampling
Periodic
Inspections
paragraph
paragraph
X
Leakage
Tensile strength
X
Overtighening torque
X
Burst pressure
X
Ambient temperature pressure cycling 1/
X
Leakage test
1/ Testing shall be performed in the order specified.
4.6.4 Sampling and periodic inspection samples.
4.6.4.1 Lot. A lot shall consist of hose assemblies manufactured under essentially the same
conditions and submitted for inspection at substantially the same time.
4.6.4.2 Lot samples. For each lot of five hundred hose assemblies or fraction thereof produced, four
hose assembly samples 18 inches ± 6 inches (5.49 m ± 182.88 cm) long shall be fabricated from random
samples of the bulk hose and end fittings using production processes and procedures.
4.6.5 Non conformance sampling and periodic inspections. In the event a failure should occur during
sampling or periodic inspection tests, specified in table III, then the production lot shall be screened for
that particular defect and defects removed. An inspection lot shall be selected from the production lot
and all sampling and periodic tests shall be performed. If one or more defects are found in the second
inspection lot, the production lot shall be rejected and shall not be supplied to this specification. Test data
of part performance shall be made available to the contracting agency upon request.
4.7 Inspection methods.
4.7.1 Visual examination and dimensional check.
4.7.1.1 Visual examination. The hose assembly shall be visually examined to ascertain whether both
ends are firmly sealed with a protective device and to determine conformance with respect to materials,
configuration and workmanship. The hose assembly shall meet the requirements specified in 3.5.1.1.
4.7.1.2 Dimensional check. The hose assembly shall be checked dimensionally to determine
conformance to the requirements specified in 3.5.1.2.
4.7.2 Proof pressure (see 3.5.2). The hose assembly when subjected to proof pressure shall meet
the requirements specified in 3.5.2. The following details shall apply:
a. The hose assembly shall be conditioned at not less than 160°F (71.11°C) for a minimum of
one hour.
b. Immediately after the conditioning period, the hose assembly shall be subjected to 8,000 psig
(551.58 bar) hydrostatic pressure for not less than 30 seconds or exceeding 5 minutes.
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