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Open root? Didn't you just post this?
"My boss Doesn't want to pay the extra for T,Y,K qualification anymore and since we are just splicing pipe he decided to go for the groove with backing to save a few bucks."
So why the open root??? Are the production joints going to be open roots??? There is a wire that acts much like a 6010 fast freeze electrode for FCAW and is used for open roots... Instead of using a drag or backhand or pulling technique of depositing the wire, this wire you would use a forehand or push technique to fill the open root and ensure adequate penetration, but for the life of me I don't remember the brand or AWS electrode designation for FCAW... It might have been a Hobart wire, but I'm not sure. Sorry I can't be more helpful with that. Other thna that, ESAB has always had superior FCAW filler ever since they took over Alloy Rods and the Dual shield brand. Their self shielded wire is pretty good considering self-shielded FCAW. ;)
Respectfully,
Henry