Dears :
as I mentioned before most standard told max 2 times for same weld .
WPS issued to check :
- welders ability to do weld ( even repair )
- the mechanical properties as requested .
- flow it in work .
etc.........
about to material used i agreed high strength plus thickness , we need to used preheat :
to reduce the cooling due to high thickness .
- removed internal stress
- removed the risk of delay cracks
plus post weld treatment or heat treatment ( annealing or normalize as it request ).
for undercut it depends on acceptance criteria but normal RT can not told it is sharp or smooth , the depth of under cut is factory to accept or reject , normal undercut removed not need weld . 45 mm smooth still you in safe but that mean travel speed high or current high .
same as concavity it depends on your accept criteria
API 1104 2013 also repair two times .
warm regards
Kindest regards,
Eng.Siddig Hamid Mohammed
Pipelines Repair&C.P Dept.Manager
Petrolines for Pipes & Engineering Work Holding Co.
T +249 187 027223 IP Phone Ext. 7223
F +249 183 027120
E sdhamid@sppc-sd.com
W www.sppc-sd.com
ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
M +249-912221242
P Please don't print this email unless you really need to.
No comments:
Post a Comment