MIL-PRF-20042E
not well rounded shall be blended.
4.
VERIFICATION
4.1 Conformance inspection. Conformance inspection shall consist of the
examination and tests as specified in 4.2 and 4.3.
4.1.1 Lot. Flanges of the same type, class, size, and rating presented
at one time shall be considered a lot for purposes of sampling and inspection.
4.1.2 Sampling for visual and dimensional examination. As a minimum,
the contractor shall randomly select a sample quantity of completed flanges as
specified in table III and examine them as specified in 4.2 (see 6.3.1).
TABLE III.
Sampling for visual and dimensional examination.
Sample size
Lot size
Major defects
Minor defects
2 to 8
All
3
9 to 25
8
3
26 to 50
8
5
51 to 90
8
6
91 to 150
12
7
151 to 280
19
10
281 to 500
21
11
501 to 1,200
27
15
1,201 to 3,200
35
18
3,201 to 10,000
38
22
4.1.3 Sampling for hydrostatic pressure leakage test. As a minimum, the
contractor shall randomly select a sample quantity of completed flanges as
specified in table IV and test them as specified in 4.3.1 (see 6.3.2).
TABLE IV.
Sampling for hydrostatic pressure leakage test.
Lot size
Sample size
All
2
to
8
13
9
to
151
20
151
to
280
29
281
to
500
34
501
to
1,200
50
1,201
to
3,200
60
3,201
to
10,000
4.1.4 Sampling for chemical analysis. Samples for chemical analysis
shall be taken from one or more flanges selected from each melt from which the
lot offered was cast, for the analysis specified in 4.3.3.
4.2 Examination. Each of the sample flanges selected as specified in
4.1.2 shall be examined to verify compliance with all the requirements of this
specification not involving tests. Examination shall be conducted for defects
listed in table V.
6
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