I have a WPS for welding a branch connection from 2 3/8" thru 12 3/4" from 3/16" to 3/4" wall thickness. Would this qualify for welding on 1/2", 3/4" and 1" threadolets or would I need to have a WPS that goes down to an OD of 1/2"? Also, same sizes used, say I want to weld a threadolet onto X70 pipe and the threadolet is A105, would my procedure have to state that I was good from X70 to A105 or would I just need a WPS for X70 only and the TOL material is mute? Thanks!