learning tig root on pipe

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Ok so i got my 6" 6g pipe cert. 6010 root and 7018 all the way out. Now i want to start practicing my tig root. How and where do i start the puddle on 6g? Top piece or bottom? Do i melt the filler to pipe or start puddle on pipe bevel then dip filler in puddle? Please help me out old wise welding geniuses. Thanks ahead of time.Ranger 305gMillermatic 140 AutosetDewalt Chopsaw2 grindersMy Fists
Reply:Bottom, start puddle on bevel then dip.If the opening allows it feed from the inside or you will get root concavity.If the gap is smaller then you can use back and forth motions to push the root in.Basically practice a little and it will come to you.
Reply:Not sure how much tig experience you have or the specific question you're asking.  Do you know how to tack on the flat?  Are you successful on the rolled 1g, 2g and 5g?  If you are just starting out, suggest you do your tacking on the flat aligned in a piece of angle iron, then work your way through the positions.  If the case is that you are a confident tig welder and are just moving on to 6g, then IMHO the simplest method (for 6 o'clock overhead) is 1/8" filler in a snug 1/8" gap, make your bridge and then feed at a pace that leaves a slightly convex exterior.  For most cases, the first point of bridging doesn't have to be perfect as that edge will be feathered later.Pics shows a 5g cutaway at 6 o'clock.  Note the exterior profile.
Reply:Originally Posted by taz00Basically practice a little and it will come to you.
Reply:I guess everybody is different.For example I can't even think about producing the root passes you do with 7018 but did not take long to learn how to root pass with tig.
Reply:Me and Tig don't get along so well. That's why I bought a Miller Dynasty 300, she does all the work, I just turn it on!Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Ok so ill just have to practice. Ill keep u guys posted.Ranger 305gMillermatic 140 AutosetDewalt Chopsaw2 grindersMy Fists
Reply:For joint prep I like 37 1/2-degree bevel. 3/32-inch gap, knife edge / no land. For the root I use 1/8-inch filler around 95-amps. For the hot pass I use 3/32-inch filler, and don't go up more than 10-amps, or I get too much suck back.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:If I had to pick one tip that i found most useful, it is to keep the wire in the well pool at all times, i like about a 2mm root gap (closes to around 1.5mm), on carbon steel i like around 130-140 amps, on a 6 inch sch 40 pipe, more amps for bigger pipe, keep moving, and pushing the wire in.practice is the only thing that will find what work's for you, I'm currently working on a job where they like a 4mm root gap, i've had to completely re-learn the root run doing so, it's always good to be versatile when it comes to prep.