SAW welding
SAW welding
(OP)
I already have a PQR (P1G1 TO P1G2) qualified with EH10K filler wire & F7A6/P6 EH10K Flux by SAW process with PWHT.
Now the customer spec say high manganese fillers are not to be used to weld the Carbon steel material.
Which filler & Flux I should go for?Does I have to qualify a new PQR with changed filler.What i will need to do to avoid a new PQR qualification?
Thanks in advance.
Now the customer spec say high manganese fillers are not to be used to weld the Carbon steel material.
Which filler & Flux I should go for?Does I have to qualify a new PQR with changed filler.What i will need to do to avoid a new PQR qualification?
Thanks in advance.





RE: SAW welding
Is the PQR qualified per ASME Sec IX?
RE: SAW welding
RE: SAW welding
Your exsting PQR may support a change in consumables. Review the applicable variables under QW 404 in QW 254 of Sec IX. Note: If impact testing is required, you may not change classification. See QW 404.35
Assuming impacts are not requred, there are many choices of carbon steel consumables available and you may want to consult with your local supplier to determine which are readily available in your area.
RE: SAW welding
RE: SAW welding
In reviewing the applicable variables one concern is that the Mn limit for EH wires exceeds that allowed for A1 deposits. The A number is an essential variable.
RE: SAW welding
RE: SAW welding
Does that mean i can use EM12 K wire & F7A6 EM12K Flux with same supporting PQR?
RE: SAW welding
In my opinion, considering the information above, changing wire to EM12K does not invalidate the procedure, however, you'll need to verify that no other essential variables are being changed.