What is a major disadvantage of Di-Lok chain compared with Oil Rig Quality (stud link) chain in floating drilling rig operations?
Official USCG Answer & Rule Citation
Correct Answer: Option B — Shorter fatigue life
Di-Lok chain is constructed by forcing forged studs into drop-forged links, resulting in a shorter fatigue life under continuous cyclic loading on floating drilling rigs compared to Oil Rig Quality stud-link chain.
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