Hi Rems,
Ya its qualified, if the welder is qualified without backing, he can able to weld with & without backing. If he is qualified in with backing he cant weld without backing.
Regards,
E.S.Mani.
On Sat, Feb 5, 2011 at 10:43 AM, <lordrems@gmail.com> wrote:
According to ASME sec IX, change in P-number and F-number is an essential variable for welding performance qualification. QW-423 said that when a base metal with P- or S-No 1 through P- or S-No. 11, etc is used for welder qualification, the welder is qualified to weld all combinations of base metal with P- or S-No 1 thru P- or S-No 11 etc.
I have welders who are qualified on GTAW process using a P1 materials of course with F6 consumable, are these welders qualified to weld an Austenitic Stainless Steel (P8 material) with stainless steel consumable which is still under F6 with argon as the backing gas.
Regards
Rems Okonkwo
Nigerdock Nig PLC
Sent from my BlackBerry wireless device from MTN
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Regards,
E.Subramanian
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