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Technical Discussions
S.Williams
S.Williams
22:53 Feb-01-2019
Penetrant Dwell Time Change

Back around 2003 ASME changed the dwell time in Section V from 7 minutes to 10 minutes. Does anyone know why it changed, what was the reasoning behind it? Was there testing done that determined that 7 minutes was not enough to find certain defects?

 
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S.Williams
S.Williams
16:24 Feb-15-2019
Re: Penetrant Dwell Time Change
In Reply to S.Williams at 22:53 Feb-01-2019 (Opening).

Bump..

 
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William A Jensen
Other,
IHI Southwest Technologies, Inc., USA, Joined May 2017, 67

William A Jensen

Other,
IHI Southwest Technologies, Inc.,
USA,
Joined May 2017
67
22:36 Feb-15-2019
Re: Penetrant Dwell Time Change
In Reply to S.Williams at 22:53 Feb-01-2019 (Opening).

I'm not sure, but my guess is that Operating Experience likely showed that the dwell time was insufficient to find the minimum flaw sizes in enough different materials that it was expanded.

 
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