(a) According to ASME IX, QW-404.9: “A change in the indicator for minimum tensile strength” is an essential variable. Is a new PQR required, if a qualified WPS with a F6A2 flux changes to a F7A2 flux (Changing to greater tensile strength)?
(b) In the table of QW-254 Submerged-Arc Welding (SAW) variables, does “flux designation” in QW-404.29, mean flux classification (e.g. F7A2)?
(c) In the table of QW-254 Submerged-Arc Welding (SAW) variables, does “Classification” in QW-404.33, mean electrode classification (e.g. EM12K)?
(d) In the table of QW-254 Submerged-Arc Welding (SAW) variables, does QW-404.35 mean that changing from “F7A2-EM12” to “F7A2-EH14” (Just electrode changing) or changing from “F7A2-EM12” to “F7A4-EM12” (Changing to a better impact test value” require new qualification?
Thanks