1st check with the designer about the required thickness based on pressure calculation and corrosion allowance
2nd if it is not accepted by the designer … use your welding procedure for filling this portion with filler metal … in my opinion (I did not checked B31.3) you are not in need for reference because you have approved PQR and WPS and it is a welding issue
3rd 12.5% is a +/- ratio for pipe factory fabricator not a design issue
Senior QC Eng.
Ahmed Osman
OCI Egypt
+20 122 5880434
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of jesti fer
Sent: Monday, January 30, 2012 4:23 PM
To: materials-welding@googlegroups.com
Subject: [MW:13583] Pipe damaged during fabrication
Dear Experts,
I have problem in our site that, we found some fabricated pipes ( as per B31.3) the parent material thickness reduced by grinding (or due to any handling mark) more than 12.5% is not acceptable,
is there any possibility to build up (Buttering) the base metals. Where can I will get the reference
jestifer
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