I support the reply given by Mr.John Henning.
Also there is no " P2 " material in ASME.
Regards
Prem Nautiyal
On Tue, 18 Jan 2011 23:07:24 +0530 wrote
>Dear all
If I have a WPS with P1G1 to P1G2, is it qualified to weld P1G1 to P1G1 and P1G2 to P1G2?I am not clear what QW403.5 states. Pls correct my interpretaion of the section. This is my interpretation:-
QW 403.5 For ferrous materials in table QW/QB-422, a procedurequalification shall be made for each P-Number Group Numbercombination of base metals, even though procedure
qualification tests have been made for each of the twobase metals welded to itself. (Is both P numbers and group numbers changing in this case (eg. P1G1 TO P2G2) or is only the group number is changing P1G1 to P1G2?
Assuming the first scenario, if one has 2 WPS 1. P2G1 to P2G2
2. P1G1 to P1G1
then also one needs to qualify a procedure for P1G1 to P2G1, which is obvious as change of p no. is an essential variable)
If, however, two or morequalification records have the same essential and supplementaryessential variables, except that the base metalsare assigned to different Group Numbers within the same
P-Number, then the combination of base metals is alsoqualified.Assuming if one has 2 WPS
1. P1G1 to P1G12. P1G2 to P1G2
then for P1G1 to P1G2 combination is qualified by the above two WPS, In addition, when base metals of two differentP-Number Group Number combinations are qualified using
a single test coupon, that coupon qualifies the welding ofthose two P-Number Group Numbers to themselves as wellas to each other using the variables qualified.Assuming if one has one WPS
1. P1G2 to P2G2
then the following 2 combination are also qualified by the above WPS,
1. P1G2 to P1G22. P2G2 to P2G2
3. P1G2 to P2G2
This variable does not apply when impact testing of theheat-affected zone is not required by other Sections.
QW 403.5 APPLIES only when impact testing of HAZ is required by other sections?
back to my original question, I think even if I have a WPS FOR P1G1 to P1G2, I would need to qualify a wps for to weld P1G1 to P1G1 and P1G2 to P1G.
Your comments in this regard would be much appreciated.
Best regards
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PREM S NAUTIYAL
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