Nalla,
I'm going to start with a major disclaimer: I haven't welded to ASME in years and currently I don't inspect to it and don't have it in my library.
Now, having said that and probably disqualified myself from any further discussion I would state this: Looking at it from my perspective (D1.1 which you referenced) If you tested it and/or welder in 6G then you qualify for ALL positions. But you can't assume that what can be done in 5G and/or 2G will be successful in 6G.
Now, the important part of your question is to rather ASME will allow you to take those PQR's and write a WPS and then weld in the 6G position. My instincts tell me 'NO' but I can't really state so dogmatically.
My next comment would be to the objection of the Inspector. Since when, a good welder using the perameters of a test/PQR/WPS for 5G should be able to use the same Volts and Amps to weld successfully in 6G. It's not as much a settings issue as it is a skills, procedure, and electrode manipulation issue.
But, sorry, I can't really give you a code reference.
Have a Great Day, Brent
This should have appeared underneath Nallas initial post but for some reason the reply to a particular post does not work.
Nalla,
Why would you waste all the time and money to weld 2 x 30 mm thick coupons, perform numerous mechanical tests x 2 and then PWHT x 2 when they appear to be exactly the same PQRs (apart from position) ?
As I have noted below the 5G PQR qualifies you for all positions - impact tested or not.
Cheers,
Shane