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Page Title:
Sampling of links for proof test |
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|  MIL-S-18313G
4.4.1.3 Sampling of links for proof test. Sample links shall be selected in accordance
with table II from the total quality of links required for the slings in each lot, prior to
galvanization and assembly with webbing for the test of 4.6.2. If any sample link fails in
this test, this shall be cause for rejection of all links.
TABLE II. sling of links for proof test.
Sample size
Number of links
2
4
to 16
3
20
to 40
5
44
to 68
7
112
to
72
10
300
to
116
500
to
15
304
504
800
25
to
804
to 1,300
35
1,304
to 3,200
50
3,204
75
to 8,000
4.5 Examination of slings. Each of the sample slings, selected in accordance with
defects classified as shown in table III to determine compli-
4.4.1.2, shall be examined
ance with the requirements of this specification which do not require tests.
TABLE III.
Classification of defects.
Defects
Categories
None defined.
Critical:
Major:
Slings not complete; parts missing.
101
Component parts not new; evidence of reclaimed, used, or salvaged
102
components.
Evidence of use of unauthorized materials or repairs.
103
Slings not size specified.
104
Hoist links not galvanized.
105
Link surface not smooth; not free of blisters, seams, laps, cracks,
106
or pit holes.
107
Link configuration and dimensions nonconforming to figure 2.
Webbing not of type specified, and are not free of splices.
108
Integral slots of webbing not woven with length and spacing as
109
specified.
Webbing not impregnated with type rubber latex compound required.
110
Flame-proof treatment of webbing nonconforming.
111
Evidence of use of dyes, detergents, chemicals, or finishing agents
112
which cause deterioration of webbing in normal storage.
Thread not of nylon cord specified.
113
Mesh configuration and dimensions nonconforming.
114
Frame configuration and composition nonconforming.
115
Stitches not continuous; not properly maintained thread tension;
116
evidence of loose stitches.
Stitching pattern nonconforming: frame webbing and superimposed
117
mesh webbings not stitched as specified.
Friction pads not same type of webbing, not located or attached as
118
specified.
Minor:
201
Size identification web insertions not of assigned color; not
inserted into body as specified.
Color of webbing nonconforming.
202
4.6 Tests.
4.6.1 Spacing of slots. Measurement of slot spacings shall be made on eight webbing
samples. The exact centers of two consecutive slots on each sample shall be marked on the
selvage, and the distance between marks measured with a metal tape graduated in 1/16 inch
(see table I).
5
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