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Trepannation

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engresague

engresague

Mechanical
May 13, 2014
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Hi,
Could any of you guys give me more explanation about the subparagraph under. I would like be sure if that refer to trepannation of the Weld.

API 1104
8.2 Methods of Inspection
Trepanning methods of testing shall not be used

Thanks in advance
 
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In 1104, it means cutting a hole in the pipeline and inserting the radiographic guide tube into the pipe and making a panoramic exposure. It is usually then plugged with a threaded Gamma Plug and seal welded. This is not allowed by API-1104.
 
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