Dear Sir,
As i know & as per QW 256 & QW408.9 , only deletion and chnage in backing gas composition is essentiel variable, so we can qualify WPS without backing but we will have sure problem in penetration. The best is to do one PQR with backing gas and use it to qualify all your WPS's in production.
Regards.
--
GHRAB Zakaria
-- As i know & as per QW 256 & QW408.9 , only deletion and chnage in backing gas composition is essentiel variable, so we can qualify WPS without backing but we will have sure problem in penetration. The best is to do one PQR with backing gas and use it to qualify all your WPS's in production.
Regards.
2011/2/10 Srinivas Engr <srinivas.gmsrini@gmail.com>
Dear All,
As per QW 256, GTAW process,
QW 408 Gas, There is no essential variable for gas Backing for P.No.
-8. Austentic Stainless Steel. A312 & others.
So we can qualify WPS without gas backing/Bsckpurging.
Am i right or not?
Pl clear me
Regards
Srinivas
--
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.
--
GHRAB Zakaria
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.
No comments:
Post a Comment