Currently i'm developing WPS of buttering weld on inner pipe (14.3mm DNV gr450 + 2.5mm UNS N08825). I sent them to mechanical testing base on DNV spec for incoloy clause. Unfortunately we failed for G48 method A.
Right now I try to find out the consequence of failure.. I not sure how the methodology to perform buttering weld, Is it required purging with purify argon? Since we are using GTAW process with flat position. Maybe the failure because of heat?We did control the heat input less than 1kj/mm and temperature below 50 degree C. The testing according to G48 with method A and temperature at 22 degree C for 24Hrs.The specimen prepared 75mmX50mmX 2.5mm(CRA thickness). The issue is the pitting appeared at liner area.(between carbon steel and CRA)
Please advise.
Thank you.
Best Regards,
AFA
-- 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/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
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.
No comments:
Post a Comment