ASME Section IX, Article II includes tables for each welding process listing the essential, nonessential, and supplementary essential variables. As stated in one of the posts, the PQR must list all the essential variable and when applicable (toughness testing required) the essential variables. The WPS must include both the essential and nonessential welding variable, and when required for notch toughness, the supplementary essential variables.
When reviewing a welding documentation package submitted by a contractor, I use those tables found in Article II as the basis of my review. I check the PQR to verify all the required information is listed (including the appropriate signatures and dates), then I compare the WPS to the PQR and check the ranges to see they comply with ASME requirements.I also check for the appropriate signatures and dates, and last but not least, I compare the welder performance test record to the WPS and verify the qualification ranges are appropriate.
One point I would make is that if the nonessential variables, such as arc voltage, welding current, and travel speed, are not recorded while welding the test coupon, what is the basis of listing those variable in the WPS? Evidently the answer is "you pull them out of your butt." Not a very rational solution to the problem in my humble opinion. It is a good argument to record the welding parameters used for each weld bead and an argument in support of having someone present (a test witness) to record the data. Contrary to some responses I have received from various contractors’ QC managers, few welders can record the data while they are concentrating on depositing sound welds.
Best regards – Al
