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We classify the drillpipe as brand new, premium, class 2, etc. It is based on wear of pipe body. I like to know when we should reject a drillpipe if box or pin of tool joint wear to a limit.
(Question asked by Kyi Lwin)
You can refer to API 7G:
You can find tables that provides Recommended Min TJ OD based on torsional strength of Box and Drill Pipe.
(Answered by Yunchuan)
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