understanding of ASME code IX 1

[Lahane]

I had a impact tested PQR (GTAW+SMAW) with P1G1 TO P1G2 material having a coupon thickness 6 mm with 3 mm GTAW & 3 mm SMAW.(Qualification as per ASME sec IX)
so my base metal qualification is 3 to 12 mm with 6 mm GTAW & 6 mm SMAW.
I had another impact tested PQR(GTAW+SMAW+SAW)with P1G1 TO P1G2 having coupon thickness 12 mm with 2 mm GTAW,2mm SMAW & 8 mm SAW.

Can I develope a WPS with (toughness requirement) 3 to 24 mm base metal thickness qualification (GTAW+SMAW+SAW) having above two PQR as supporting PQR?
If yes,what will be weld metal qualification for each process?
Can I weld a production piece P1G2 TO P1G1(requiring toughness test) of 10 mm thickness with 2 mm GTAW & 8 mm SAW having above two PQR as supporting PQR & maintaining all the other essential & supplimentery essential variable of SEC IX.

A quicky reply is highly appreciated.

 

[GenB]

6mm GTA and SMAW fill to max qualified.

 

[Lahane]

As per customer spec ,10 mm production piece's final pass need to be welded with SAW process only so can the weld procedure be developed by above way with above two supporting PQR?

 

[weldtek]

Lahane,
Based on the info above, for impact qualified applications, your SAW process cannot be used on plate less than 12mm thick.

 

[pandithan]

Is it mandatory to mentioned WPS no. on PQR, if so where it is given in section IX

 

[weldtek]

Pandithan,

No it is not necessary to place the WPS # on a PQR, and for many folks it's a bad idea.

For one thing, you may have multiple WPS' supported by one PQR and if you were to list the WPS numbers on the PQR you'd be constantly revising the PQR.

 

[Guest102023]

Please spend the money and qualify your processes separately. Combinations lead to no end of these types of complicated questions.

I see Charpy testing of two (or more) processes within the same coupon as a weakness in Section IX and possibly even a loophole. One of the deposits could have relatively poor properties on its own, but gets allowed because the other is very tough. How do you measure the actual respective deposit thicknesses anyway, especially on thin material?

 

[Kiwi2671]

brimstoner,
ASME IX really only points you to a referencing section for impacts.

QW-171.3 Location and Orientation of Test Specimen.
The impact test specimen and notch location and
orientation shall be as given in the Section requiring
such tests.

ASME B31.3 states under "Test piece for preparation of impact specimens."
A-4 One required for each welding procedure, for each type of filler metal (i.e., AWS E-XXXX classifition),and for each flux to be used.

As for the measuring of processes - a steel rule across the face of the plate / pipe with the shaft of a vernier caliper pointing down into the prep works very well for measuring.
Hope that helps,
Cheers,
Kiwi.

Hope that helps

 

[pandithan]

yes