RR-C-271F
TABLE XXIX. Sampling procedure for type XI, bead chain insulating couplings.
Number of couplings per lot |
Number of samples to be selected for dielectric strength test |
1 to 50 51 to 1,000 1,001 to 10,000 |
2 4 10 |
4.2.2.2.4 Chemical analysis. Steel chemistry of material for chain and attachments shall be determined from the certified mill data sheet or by analysis of either bars or from finished chain or attachments.
4.3 Examination.
4.3.1 Chain. Each sample of chain selected as specified in 4.2.2.1 shall be examined to determine conformance to this specification regarding dimensions, finish, quality of welds, and other requirements. Chain shall be measured to the inside of the end links after the chain has been proof tested.
4.3.2 Attachments. A random sample of attachments as specified in 4.2.2.2 shall be examined to determine conformance to this specification regarding dimensions, finish, quality of welds, and other requirements. If attachments are to be zinc coated, surface inspection shall be made before and after coating. Proof and breaking tests shall be made after zinc coating.
4.3.3 Rejections.
4.3.3.1 Chain. If the inspection sample fails to meet the requirements as specified in 4.3.1, the lot shall be rejected.
4.3.3.2 Attachments. Sample attachments failing to conform to the requirements specified in
4.3.2 shall be rejected. If any defects are noted in the original sample attachments, additional attachments shall be randomly selected as specified in the original sampling plan, and if any defects are noted, the entire lot shall be rejected.
4.4 Tests.
4.4.1 Chain.
4.4.1.1 Breaking test. Breaking tests shall be performed in accordance with
ASTM A391/A391M, ASTM A413/A413M, ASTM A466/A466M, ASTM A467/A467M, or
ASTM A973/A973M, as appropriate.
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