Is there a standard of wear limit of OD of tool joints of drillpipes?

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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.

Cheers, Larry

(Answered by Yunchuan)

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