The evaluation of UT results in back up weld area is difficut because of method limits (low accuracy in location of indications, especially at small thickness). UT indications in this area may come from the welding discontinuities (lack of penetration, deep and sharp undercut, lack of fusion, etc..), but, also, from the geometric configuration (excess penetration, etc.). In these situations it is recommended to complement the UT by RT.
--- On Sat, 4/10/10, Koldas <serdarkoldas@gmail.com> wrote:
From: Koldas <serdarkoldas@gmail.com>
Subject: [MW:4770] AWS D1.1
To: materials-welding@googlegroups.com
Date: Saturday, April 10, 2010, 12:19 AM
Hi everybody; According to AWS D1.1 3.13.4 Fİgure 8 in structural steel projects.CJP is written in that.Is complete penetration required in back up weld area?. For example;PQR specimen is welded but according to UT results , there are defects only in backup weld area.Is it allowable?. Is backup weld area partial penetration?? Annex K: BACK UP WELD(Tubular Structures):The initial closing pass in a CJP groove weld,made from one side only,which serves as a backing for subsequent welding,but is not considered as a part of the theoretical weld(Figures 3.8 through 3.10,Details C and D) Serdar KOLDAS Mechanical Engineer B.Sc. -- To post to this group, send email to materials-welding@googlegroups.comTo unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.comFor 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. To unsubscribe, reply using "remove me" as the subject.
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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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