MIL-DTL-13444H
4.6.3.1 Sampling for bulk hose. Sampling for bulk hose shall be performed on each continuous run
under essentially continuous conditions. Samples shall be selected at a rate of 1 sample for each full or
partial increment of 750 feet (228.60 m) of hose produced in the continuous run, up to a maximum of 2
samples (for continuous runs greater than 1,500 feet (457.20 m), 2 samples will be selected, but they
shall be representative of the entire production run). Sampling tests for length change and burst shall be
performed in the listed order on each sample as applicable. When a hose assembly is specified in the
test method, a hose assembly shall consist of the hose as specified herein, coupled with fittings as
specified in 3.5.5. Any subsequent changes regarding the sources of a fitting or bulk hose used in a
qualified assembly must be approved by the qualifying activity.
4.6.3.2 Hose assemblies. For hose assemblies, the inspection lot shall be 8 items tested for each
3000 assemblies produced (large lot option). At the option of the manufacturer, one item may be tested
for each 375 assemblies produced (small lot option). If there has been some production, but the number
hose assemblies produced has not reached 375 for a specific size within three years, the manufacture
shall perform sampling tests on one hose assembly of that size unless documented approval to not
perform the tests has been obtained from the qualifying activity.
4.6.4 Sampling and periodic inspection. Sampling and periodic inspections shall consist of the
inspections specified in table VIII and shall be made on test samples from production lots which have
been subjected to and passed the individual inspections (see table VII).
TABLE VIII. Sampling and periodic inspections.
Requirement
Inspection
Sampling
Periodic
Inspections
paragraph
paragraph
Elongation and contraction 1/
X
---
Burst pressure
X
---
Vacuum collapse resistance 1/
---
X
1/ Elongation and contraction" and "vacuum collapse resistance" are for bulk hose only.
4.6.4.1 Periodic testing sampling plan.
4.6.4.2 Periodic quality conformance inspection (QCI) (Bulk hose only) . Periodic QCI will be 4
samples tested to each required periodic test for each produced 20,000 feet (6096 m) for bulk hose
specifications (large lot option). At the option of the manufacturer, 1 sample may be tested to each
required periodic test for each produced 5,000 feet (1524 m) as applicable (small lot option).
4.6.4.2.1 Reduced production bulk hose. If there has been some production, but the footage of bulk
hose produced has not reached 5,000 feet (1524 m) for a specific size within three years, the
manufacturer shall perform periodic control tests on one sample of that size, for each required periodic
test, unless documented approval to not perform the test has been obtained from the qualifying activity.
4.6.4.3 Periodic samples. Periodic samples may be subjected to more than one periodic test at the
discretion of the manufacturer. However, the manufacturer assumes all risk that the effect of one test
will not have a detrimental impact on the following test.
4.6.4.4 Disposition of test specimens. Test specimens that have been subjected to sampling and
periodic inspection in table VIII shall not be delivered on the contract or purchase order.
4.6.5 Acceptance of conformance inspection data. Required conformance tests at the hose assembly
level that were already performed at the bulk hose level may be eliminated if documented approval has
been obtained from the qualifying activity.
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