So table 3.4 says that if you are on a Class 1 structure, a pipe test on 6" thru 8" with a wall thickness of 1/8" thru 3/8" will qualify your procedure for 3/4" thru 16" nominal OD pipe and you will be allowed to work on wall thicknesses from 1/8" thru 2 x actual wall thickness used in the test.

Class 2 is similar, except you need to use 2" S80 or 3" S40 pipe, and the ranges are 3/4" thru 4" OD and 1/8 thru 1/2 WT

The classes refer to static or dynamic loading of tubular structures

you will need a tension test of some sort, either a reduced section as per Fig 3.7, alternate reduced section per Fig 3.8 or full section per Fig 3.9.  All of the dimensions are in these figures, several of the lengths are "as required by testing machine"

I do not see an option for a test assembly other than that in the code

It looks like performance qualification will be handled with the same coupon as the PQR test

Nothing says you cant add your own testing, as long as code requirements are met.  Run the above tests, and then have the guys weld out a coupon that is like the production part, they have to pass both tests to do the work