Thursday, February 10, 2011

[MW:9798] Backing by gas/Back purging is not essential for P.No 8 - Austentic stainless steel? - ASME Sec 9

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

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