Hi John,
I'm making an open top, 24" round tank out of SA-240 type 309S, 9/16" plate and a spreader bar type carriage unit for the tank out of SA-240 type 316L, 1/4" square tube, plate, and angle, utilizing the FCAW process.
As I don't have a PQR for either type metal, I was wondering if I could qualify both with one 3/8" Plate PQR. ( The tubing welds are not full penetration, so a 6GR won't be necessary for PQR or WPQ?)
Also, is there a pre-qualified PQR in the book for a full penetration, back gouged (by grinding) joint that would cover fillet welds as well?
Thanks for your time!
Tim
P.S. - Don't loan out your code books as it seems like they never find their way back. :(
Tim,
To my knowledge fillet welds are PJP welds. There are prequalified requirements for fillet welds, but not CJP.
If you put a fillet weld on a T joint and back gouged from the other side to filler metal you would have a goove weld with a fillet weld cover. Which may be an over-kill of filler metal deposit. Depending on the configuration of the groove, beveled, square, etc. would determine the type of weld .
A fillet weld T joint qualification, requires a single pass on one side and a mutiple pass on the other. Three macroetches are required for qualification of the PQR.
Ths shapes to be welded is also important. I'm trying to picture the weldment, and I just can't picture how you will be able to backgouged a tube.
Oh well, I hope this helps
Lew
Hi Lew,
I would not need to backgouge the tube as it would only require fillet welds.
My goal is to qualify the welders using a single 3/8" full pen backgouged plate test as this would also cover both the full pen plate butt welds on the tank and the fillet welds on the spreader bar carriage unit.
I was wondering if there was a prequalified procedure in D1.6 that I could use, or if I would have to qualify new procedure.
Thanks,
Tim