ASME 9-Writing 1 WPS out of 2 supporting PQRs 2

[athilatt]

Could anybody Please provide an answer..

Is it possible to write a WPS out of 2 supporting PQRs of different Processes(Gtaw and Smaw-both are of 8mm test coupons),provided all other essential variable are within limit.
It seems ASME Section 9, QW 200.4(a) and(b) confusing for me.Could anybody clarify it in simple words.

 

[DVWE]

Yes it is allowed to write a single WPS with multiple PQRs, but you're looking in the wrong section. Review QW-200.2 in its entirety, specifically QW-200.2(f).

QW-200.4(a) is in reference to production welding, it is simply stating that you may use multiple WPSs on a single production joint.

(b) gives guidelines of how to qualify a root layer only procedure, used in conjuction with other PQRs.

 

[athilatt]

Thanks for prompt reply DVWE,

I understood from your reply like this :

1)For supporting PQRs of smaller thickness(test coupons of PQRs less than 13mm)also, a single WPS can be produced,provided all other parameters are conforming.

I was under a wrong impression as you mentioned, that for a minimum 13mm thickness required for supporting PQR

2)If my PQRs,one GTAW and other one SMAW both on 8mm thickness each, its possible me to club supporting PQRs(GTAW+SMAW) and write a new WPS for 8mm thick---Am I Right?

Thanks again DVWE..

 

[DVWE]

Based on your information, I'm going to make some assumptions.
1. You have a weld joint in production which is 8mm thick.
2. You have a GTAW WPS/PQR which was qualified on 8mm thick plate.
3. You have a SMAW WPS/PQR which was also qualified on 8mm thick plate.
4. You want to create a new WPS which uses a GTAW root pass, and SMAW fill with the existing PQRs that you have.

Are all these correct?

 

[athilatt]

DVWE,

Assumptions are Exactly Correct..GTAW-Root and SMAW-Other passes

Hope a reply from your end, will be really helpful for me.
Tahnks

 

[DVWE]

You can absolutely combine these PQRs to make your WPS.

 

[10112005]

yes

 

[GenB]

Technically you can do it, but what about the Code,
seems to me that combination welding is not aloowed.
your option is a combination PQR with all the parameters
then you can have several WPS's which is different.