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Technical Discussions
Larry
Larry
00:16 Mar-26-2004
UT Acceptance Criteria

I seem to recall some code in which the acceptance criteria depends on which third of the weld the defect lies in (top third, bottom third, or middle third). I dont recall what code this is, can some one please refresh my memory. I do remember that you could basically have a lot of defects in the middle third due to the low stress in that area, (neutral axis).


 
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Bud
Bud
00:43 Mar-28-2004
Re: UT Acceptance Criteria
You may be thinking of ASME Section XI, where the lower or inner one third is inspected with volumetric methods (UT/RT) and the upper or outer one third with surface methods (MT/PT/VT). Acceptance criteria is based on size of recorded indications (length) and location.




 
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John Woollven
John Woollven
08:45 Mar-29-2004
Re: UT Acceptance Criteria
----------- Start Original Message -----------
: I seem to recall some code in which the acceptance criteria depends on which third of the weld the defect lies in (top third, bottom third, or middle third). I dont recall what code this is, can some one please refresh my memory. I do remember that you could basically have a lot of defects in the middle third due to the low stress in that area, (neutral axis).
------------ End Original Message ------------

I believe what you may be referring to is ANSI/AWS D1.1 or its Canadian cousin CSA W59. For some of the techniques, different angle beams are specified for the top quarter, middle half and bottom quarter.



 
 Reply 
 
Larry
Larry
01:32 Mar-30-2004
Re: UT Acceptance Criteria
No its not D1.1 or W59, that refers to scanning techniques, what I was referring to was when an indication is found, the location (top, middle or bottom third) will determine whether its rejectable since each section has different requirements, as I said earlier I am pretty sure you are allowed a lot in the middle third due to the lower stresses.


----------- Start Original Message -----------
: : I seem to recall some code in which the acceptance criteria depends on which third of the weld the defect lies in (top third, bottom third, or middle third). I dont recall what code this is, can some one please refresh my memory. I do remember that you could basically have a lot of defects in the middle third due to the low stress in that area, (neutral axis).
: I believe what you may be referring to is ANSI/AWS D1.1 or its Canadian cousin CSA W59. For some of the techniques, different angle beams are specified for the top quarter, middle half and bottom quarter.
------------ End Original Message ------------




 
 Reply 
 
sujay
sujay
00:14 Nov-10-2004
Re: UT Acceptance Criteria
dear sir ,what are acceptance ceritaria forabove subject,as per asme section 8kindly sent the that to my id
thanking you,
yours faithfully
sujay----------- Start Original Message -----------
: No its not D1.1 or W59, that refers to scanning techniques, what I was referring to was when an indication is found, the location (top, middle or bottom third) will determine whether its rejectable since each section has different requirements, as I said earlier I am pretty sure you are allowed a lot in the middle third due to the lower stresses.
:
: : : I seem to recall some code in which the acceptance criteria depends on which third of the weld the defect lies in (top third, bottom third, or middle third). I dont recall what code this is, can some one please refresh my memory. I do remember that you could basically have a lot of defects in the middle third due to the low stress in that area, (neutral axis).
: : I believe what you may be referring to is ANSI/AWS D1.1 or its Canadian cousin CSA W59. For some of the techniques, different angle beams are specified for the top quarter, middle half and bottom quarter.
------------ End Original Message ------------




 
 Reply 
 

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