Dear Mr. RK Vichare,
Direct Answer: Preferable wire must cross top & bottom image but, If wires are crossing top image only and meeting the required sensitivity (required wires are appeared) than it should not be rejected (at least not just because of wires are not crossing the bottom image) Provided the gap between two images is less then or equal to 1.5" inch.
Justification to the above mention: Why only top image is very important and not the bottom image? Because, in elliptical technique Penetrameter should placed on source side and if the top image is meeting the required sensitivity, means the bottom is meeting the required sensitivity for sour because, the distance variation between two images are approximately 2'" inch (I do not know what size in your case)
Regards.
Mirza.
From: Ramchandra vichare <vicharerke@indiatimes.com>
To: materials-welding@googlegroups.com
Cc: nms@lntecc.com
Sent: Friday, September 9, 2011 8:55 AM
Subject: [MW:12387] Measure of Sensitivity on Elliptical Joints of 2"NB pipes or any other Elliptical Radiography Shots.
MOST URGENT PL.
Dear All Experts/Experienced Personal in Process Piping in Refinery/Radiography /NDT Leverl III (RT),
Dear Friends,
As all related experince personal are know about Elliptacl Radiography shorts; my question is ; while measureing sensitivity with Wire type penetrameter whether it must be cross top & bottom image of Elliptical coverage area of weld or only top portion of weld. As per my Field experience I suggested for to cover full Elliptical coverage of weld but one of my vendor is refusing to do this same. In section 5 Artical 2 page 13 Clause(d) confirming IQI Placement for weld- Wire IQI , the IQI(s) shall be place on the weld so that the length of the ire is perpenticular to the length of the weld. I sincerely requested to all experts pl be gauide per return mail.
Mater most urgent & interesting in Radiography technology
With Best Regards,
RK Vichare
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To: materials-welding@googlegroups.com
Cc: nms@lntecc.com
Sent: Friday, September 9, 2011 8:55 AM
Subject: [MW:12387] Measure of Sensitivity on Elliptical Joints of 2"NB pipes or any other Elliptical Radiography Shots.
MOST URGENT PL.
Dear All Experts/Experienced Personal in Process Piping in Refinery/Radiography /NDT Leverl III (RT),
Dear Friends,
As all related experince personal are know about Elliptacl Radiography shorts; my question is ; while measureing sensitivity with Wire type penetrameter whether it must be cross top & bottom image of Elliptical coverage area of weld or only top portion of weld. As per my Field experience I suggested for to cover full Elliptical coverage of weld but one of my vendor is refusing to do this same. In section 5 Artical 2 page 13 Clause(d) confirming IQI Placement for weld- Wire IQI , the IQI(s) shall be place on the weld so that the length of the ire is perpenticular to the length of the weld. I sincerely requested to all experts pl be gauide per return mail.
Mater most urgent & interesting in Radiography technology
With Best Regards,
RK Vichare
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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