MIL-DTL-8789F
4.6 Conformance inspection.
4.6.1 Sampling tests (inspection of product delivery). Sampling tests shall consist of the
examinations specified in table V. The inspection sample shall be selected at random from the
production lot without regard to quality and shall be the size specified in table VI.
4.6.1.1 Nonconformance of sampling tests. If one or more defects are identified, then the entire
production lot shall be screened for that defect and all defects shall be removed. A second inspection
sample shall then be selected and the sampling tests shall be performed again. If one or more defects
are identified from the second inspection lot, then the entire production lot shall be rejected and not
supplied to this specification.
4.6.2 P1 inspection tests. Fittings shall be randomly selected from a production lot to form an
inspection sample and shall be subjected to sampling and P1 inspection tests specified in table V.
4.6.2.1 P1 inspection samples. Sampling and P1 inspections as specified in table V shall be
performed on 3 assemblies (6 fittings) for each size at least once per year regardless of the total number
of fittings produced. At least 3 of the 6 fittings, used for testing, shall be flared fittings with the greatest
bend angle. If no flared fittings were produced, flareless fittings shall be used. The 6 fittings selected
shall be as representative as possible of those produced during the period in terms of fitting material and
joint configuration. If there has been no production for a particular size, during the past year, P1
inspections are not required for that size.
4.6.2.2 P1 inspections performed at bulk hose or assembly level. Required P1 inspections tests at
the fitting level that were already performed at the bulk hose or assembly level may be eliminated if
documented approval has been obtained from the qualifying activity.
TABLE V. Sampling and P1 inspections.
Sampling
P1
Requirement
Test
Requirement
1/
paragraph
method
Examination of product
X
Proof pressure
X
Leakage
X
Burst pressure
X
1/ These are destructive tests, also see 4.6.3.3.
TABLE VI. Inspection sample.
Production lot size
Sample size
1 to 8
all
9 to 90
8
91 to 150
12
151 to 280
19
281 to 500
21
501 to 1,200
27
1201 to 3,200
35
3201 to 10,000
38
10,001 to 35,000
46
9
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