Jeff,
"Showing some sort of welder qualification would insure a quick and easy sign off from EOR. Of course EOR could just as easily sign with no qualification."
"Look at figure 4.39 specimen for tack welder. then read 4.18.1.2 and 4.18.2.2 I think this would put you where you need to be. This is as easy of a test as there is, to my limited knowledge."
In light of further investigation I must state that the two responses I have posted would only be a remedy for your situation in the manner of EOR sign off and not valid qualification to process and proceedure per AWS D1.1. I would have to agree with the other post's that this indeed would be a PJP groove application. EOR sign off on tack weld qualification would be accepteble per code and would probably fly with your customer, but ideally it would be best to qualify them properly.