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MI L- R-17131C
4.2 Sampling for quality conformance inspection.
4,2.1 Lot definition.
4.2.1.1 All inspection and tests except the weld test. All rods
and powder of the same type ard size produced from the same heat or melt
at one plant shall be considered a lot.
4.2.1.2 Weld test. All rods or powders of the same type produced
from the same heat or melt at one plant regardless of size shall be
considered a lot for the purpose of the weld test.
4.2.1.3 Lot identification. Each heat or melt shall be uniquely
s
identified by the filler metal manufacturer control number or other
marking which shall appear on each unit package and shipping container.
The marking which designates the lot shall be in a position which permits
ready location by the consignee.  If control numbers or symbols must be
decoded for identification of the heat or melt, the manufacturer shall
furnish the consignee the key or instruction necessary to interpret the
code system used.
4.2.2
Smpling for inspection of filled containers.
4.2,2.1  Filled shipping containers.  From each lot as defined in
4.2.1,1, a random sample of shipping containers filled with unit containers
of rods or powder shall be selected in accordance with MIL-STD-105 at
inspection level S-4 and acceptable quality level (AQL) 6.5 to verify
compliance with section 5.
4.2.2.2 Filled unit containers. From each lot as defined in
4.2.1.1, a random sample of filled unit containers shall be selected in
accordance with MIL-STD-105 at inspection level S-4 and acceptable quality
level 6.5 to verify compliance with section 5.
Sampling for inspection of rods or powders.
4.2.3
4.2.3.1  Visual and dimensional examination of rods. From each lot
as defined in 4.2,1.1, a random sample of rods shall be selected in
accordance with MIL-STD-105 at inspection level S-4 and acceptable quality
Lot size shall
level 4.0 to verify compliance with this specification.
be expressed in pounds.  Sample size shall be the number of electrodes
to be examined.  The rods selected in this sample shall be taken from
packages selected in the packaging inspection sample (see 4.2.2.1).
4.2,3.2  Chemical analysis. From each lot as defined in 4.2.1.1,
a sufficient quantity of rods or powders shall be randomly selected from
each of two packages to provide one sample for chemical analysis in
accordance with 4.3.3.2.
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