ASME IX, QW-404

Date 03-04-2006 15:27

(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

By George-kh (**)

Date 03-09-2006 20:01

it seams not to be an interesting subject but please answer if somebody knows the answer.

By jon20013 (*****)

Date 03-09-2006 20:40

George, too many questions. Try asking one at a time otherwise many of us would prefer not to do research on your behalf.

By George-kh (**)

Date 03-10-2006 21:06

Thanks jon,
The most important part is question (d). May somebody answer it?