3G Welder Qualification Range-AWS D1.1-ED 2010

Date 05-12-2012 12:59

Dear Experts
Joint Det - Single Bevel (FP Weld Reqd.)
Deck Plate - EH 36 x Bearing Housing Rolled Tubular Structure(1M Dia x 40mm thk x Grade EQ 51 ).
Weld Process - Root run-using LB52U followed by FCAW.
Weld Position - 1G Position
There is no access to backgouging or to fit metallic backing strip.
So it will be only one side/single side welding which require FP Welds

Our 3G / 4G(SMAW) Welders qualified with metallic backing strip
I think 3G ( qualified for SMAW & FCAW )welder qualified to weld.
I dont think have to use 6G / 6GR to welder

Pls advise if my understanding is correct
Thanks

By welderbrent (*****)

Date 05-12-2012 13:48

Nalla,

If I am understanding you correctly, you will have to do a PQR and then qualify your welders to that. Single side CJP's with no backing are not pre-qualified. PQR (with first welder qualified when tests pass), WPS from the PQR test report, then qualify more welders to the new WPS.

IF the plate were with backing, then yes, your 3G and/or 4G welders would be qualified to run the 1G position. But not without backing. That changes everything.

Have a Great Day, Brent