How many Sets of Impact are required for a Multi-Process PQR
How many Sets of Impact are required for a Multi-Process PQR
(OP)
I have the following scenario and need some help with regards to the number of Impact Tests required.
Test temp: -40F
Plate: 516-70
Thickness: 1.5"
Process 1: GTAW - 0.125" t
Process 2: SMAW - 0.5" t
Process 3: SAW - 0.875" t
My understanding from ASME IX Para QW-200.4, is that each process requires impact testing. However My real question is: Would one set of WM and HAZ impacts be acceptable for both the GTAW & SMAW passes due to the thickness of the GTAW layer?
Thanks
Ian
Test temp: -40F
Plate: 516-70
Thickness: 1.5"
Process 1: GTAW - 0.125" t
Process 2: SMAW - 0.5" t
Process 3: SAW - 0.875" t
My understanding from ASME IX Para QW-200.4, is that each process requires impact testing. However My real question is: Would one set of WM and HAZ impacts be acceptable for both the GTAW & SMAW passes due to the thickness of the GTAW layer?
Thanks
Ian





RE: How many Sets of Impact are required for a Multi-Process PQR
Processes and their HAZ may be combined in one set of specimens, so answer to your question is "Yes".
If your Design Code is Section VIII-1, then minimum three sets of specimens are required when test coupon thickness is over 38 mm see UG-84(h)(3), otherwise as per above two above sentences.
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN