Khodabandeh,
It's a little hard to follow your post and you have left out some vital info such as code of construction and what code your PQR/WPS's were qualified to. Are you talking about full pen welds or fillet welds? But yes, in the broad sense you will have to qualify a new PQR/WPS for the thickness variance unless you have another WPS that has that 6.35mm or 1/4" thickness range in it. And then there is the last sentence "not available any record of welded pass with each process because of provided of PQR by another company" I don't know what you are trying to say here?
Hope that helps a little
Jim
Dear Mr.Khodabandeh,
According to ASME Sec.IX para. QW-451 (if your docs are qualified according to it) you have to submit another PQR.
Regards,
Ehsan
Hi khodabandeh
I am also having difficulties understanding the question totally, and the answer is obviously highly dependent on the welding code being used, so like the other people that have answered, I will also make some assumptions.
Given that the thickness range qualified (listed on the WPS) is 7.11 - 14.22mm, I am assuming that the code is ASME IX, and that the test coupon was 7.11mm thick, and that the qualified range is that associated with impact test requirements. Given that you are welding A106 and A105 materials, (which generally are not used where impact properties are called for) I would suggest that you find out if impact testing is a requirement. If impact properties are not required, then the PQR would support a minimum thickness of 1.6mm. If this is the case, then the WPS should be updated to reflect the increased thickness range for non-impact applications, but a new PQR would not be required for welding materials 6.35mm thick.
Just as a matter of interest, in what country will the piping / vessels be used? Also, you say that the PQR was supplied by another company. Strictly speaking this would not be allowed according to ASME IX (If this is an ASME job.) unless the original company supplying the PQR was retaining "technical control" of the work. Is this the case, or is the practice different in whatever country this installation is to be used?
Regards
Niekie