i have been welding ti.. pipe for about a month now ,i've been experimenting with gap and no gap . about 1/8 gap has been working for me but i still cant get the bead to be uniform and smooth inside. Any tips? Now my employer wants to get into zirconium ,i've never welded it before but i've heard its much like titanium. Is it? how does it flow ?and at what amps ?Any tips and technics would be greatly apreciated