30" stainless pipe, tonights effort

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So i had a nice little number tonight, myself and a fellow welder from the phillipen's filled and capped a 750mm (30"), sch 10, 304 stainless pipe to flange weld for cyrogenit service at an LNG plant, welded with TIG from root to cap.Welded with lincoln invertec V-160-T's, very nice TIG machine.Sent from my LG-P716 using Tapatalk
Reply:I'm guessin' you went through a bit filler rod....
Reply:y'all got any USA welders on that job?
Reply:Originally Posted by BaTuI'm guessin' you went through a bit filler rod....
Reply:5mm gap? that's too big to be perfect, no? What size is the land?
Reply:5Mm gap is  spot on, once you've put 4 inches of the root in that closes up to 3.5mm, which is perfect for 3.2mm filler, so you just turn the amps down and take it slow for the first bit, then it's smooth sailing, with 2.5 it'll pull in to 1.5-1.8 after a few inches, and particulary on the bottom it's near impossible to get the edges without the root sucking back under flush.max 1mm landing, but preferably no landingSent from my LG-P716 using Tapatalk
Reply:OK, so you are talking fit up without tack welding. Now I understand.Do you really prefer no landing? and with already 5mm root gap, the moment you strike the arc, the edges melt away, that leaves you with an even larger root gap, no?
Reply:Originally Posted by kingneroOK, so you are talking fit up without tack welding. Now I understand.Do you really prefer no landing? and with already 5mm root gap, the moment you strike the arc, the edges melt away, that leaves you with an even larger root gap, no?