Couple 6G questions?

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What's up guys? I just have a couple questions about 6G welding. I been practicing a lot lately and I have a couple concerns. 1.) What should my welder be on, Reverse or straight polarity? My root pass looks great on the outside and the penetration on the inside. When I get to the hot pass though with my 7018 electrode drips and makes the weld look terrible and it freezes like that. I tried putting the amperage down but know difference. That's why I ask what polarity it should be on.2,) When your actually testing for your 6G cert what polarity does it need to be on?3.) I know the pipe should be in the 6G position the whole time during the test but what about the welder? I am right handed so I like to use my right hand through out the weld. Can I walk around the joint or do whatever I need?  Thanks for your help guys I search the net before I post here but I can't get straight answers
Reply:On the whole you'll want to run 7018 on reverse polarity, but for open root welding with 7018 I like straight polarity. I've never seen it where you weren't allowed to walk on either side of the pipe. When testing, they will tell you the rules, and even give you a WPS.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:The weld procedure most likely is going to call for reverse polarity. CEP is correct though. 7018 does put in a better root on straight polarity but that may not be cool with the inspector. As for the dripping of your 7018, I'd recommend moving faster and a wider fill meaning go a little wider in the bevel and pause more on the side instead of the center of the weld. You will be able to freely to move around you test coupon as long as you never touch its angle
Reply:DCEP.  Direct current electrode positive.  What is your machine set on for your hot pass?  Are you running a weave hot pass or two stringer?
Reply:Are you putting in your root with 7018 or 6010?I have always ran both on reverse polarity (dc+) but we put our roots in with 6010.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:DCEP. Direct current electrode positive. What is your machine set on for your hot pass? Are you running a weave hot pass or two stringer? ***My machine is set on DCEP for the root and hot pass and I'm running a stringer beads, but I will try the weave pattern. Thanks Are you putting in your root with 7018 or 6010?I have always ran both on reverse polarity (dc+) but we put our roots in with 6010. ***I'm using a 6010 for the root pass and 7018 for the rest Check out deltaschooloftrades.com the pipe stuf is near the end.***Thanks man will do
Reply:Thanks slim83
Reply:I will post pics of my welds soon and hopefully I can be correcrted
Reply:If your root is 6010, it's reverse (dc+) polarity all the way.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:Hey Guys, I was just running passes around some pipe laying around. There was no joint just around the pipe and I came across that some problem again. I posted a pic of what it looks like so any help would be appreciated Thank you Attached Images
Reply:amperage ? rod size ? machine type ?Oh and that would be easier to practice with a bevel. With the above info someone might be able to help you a little betterJourneyman / Red Seal Welder (What a useless test)Miller CST 280Miller XMT 350Miller 12vs XtremeEvolution Evo 28 mag drillEvolution 380 Dry Cut saw
Reply:Originally Posted by Newfie_1986amperage ? rod size ? machine type ?Oh and that would be easier to practice with a bevel. With the above info someone might be able to help you a little better
Reply:I didn't wanna take the time to bevel the pipe and prep correctly because I knew that would happen because it did last time when everything was done right. I don't wanna waste any pipe or take the time to grind it out. So I used crap pipe and left the good stuff for when I correct that
Reply:Try just grinding some shallow grooves in the pipe to practice. Turn your amps down  try 115 and put your ground on the work piece itself instead of the fixture holding it. Also try running 3/32 7018 in my pipe experience it's easier to run that than the 1/8 at least until you get used to running uphil with that rod. Try using a slight "Z" weave making sure to pause on the sides. You don't want to hang out there to long your looking to see that the puddle is tying in to the sides good usually 1-2 seconds but dont focus on countin out the seconds just look for good fusion on the side then move across to the other side making sure not to spend a ton of time in he middle of the puddle as it will overfill and sag out on you.Last edited by Tuscany; 03-28-2012 at 11:52 PM.1973 Lincoln SA 200, Already replaced shunt coils, Idle board (SOLD)1984 Miller Dialarc 250HF, Miller water cooler, 250 AMP water cooled torch, you know the worx.
Reply:Originally Posted by TuscanyTry just grinding some shallow grooves in the pipe to practice. Turn your amps down  try 115 and put your ground on the work piece itself instead of the fixture holding it. Also try running 3/32 7018 in my pipe experience it's easier to run that than the 1/8 at least until you get used to running uphil with that rod. Try using a slight "Z" weave making sure to pause on the sides. You don't want to hang out there to long your looking to see that the puddle is tying in to the sides good usually 1-2 seconds but dont focus on countin out the seconds just look for good fusion on the side then move across to the other side making sure not to spend a ton of time in he middle of the puddle as it will overfill and sag out on you.
Reply:My root and hot pass with 6010 1/8" rods look good its just with the 7018.. ill practice a lot this weekend
Reply:With the 3/32 rod you wanna run it about 85 - 90 amps also with the smaller diameter rod try to do a small z weave but more or less a stringer with some weave if that makes sense lol. Your gonna want to weave it some so that it ties in to the sides and keeps the bead flat. And also you dont want to make your weave bead to wide that will cause slag inclusions and will fail most of the time come test day. Most inspectors won't let you weave more than 3-4 times the electrode diameter for your weave so just keep that in mind. just keep running it you'll get the hang of it. Also try fitting up some "t" joints and set them up in all positions and run a stringer bead for the root then work on multipass weave beads to fill and cover then Goto the pipe. It's a lot cheaper to work on flat stock than waste pipe learning the basics of out of position welding.1973 Lincoln SA 200, Already replaced shunt coils, Idle board (SOLD)1984 Miller Dialarc 250HF, Miller water cooler, 250 AMP water cooled torch, you know the worx.
Reply:Originally Posted by TuscanyWith the 3/32 rod you wanna run it about 85 - 90 amps also with the smaller diameter rod try to do a small z weave but more or less a stringer with some weave if that makes sense lol. Your gonna want to weave it some so that it ties in to the sides and keeps the bead flat. And also you dont want to make your weave bead to wide that will cause slag inclusions and will fail most of the time come test day. Most inspectors won't let you weave more than 3-4 times the electrode diameter for your weave so just keep that in mind. just keep running it you'll get the hang of it. Also try fitting up some "t" joints and set them up in all positions and run a stringer bead for the root then work on multipass weave beads to fill and cover then Goto the pipe. It's a lot cheaper to work on flat stock than waste pipe learning the basics of out of position welding.
Reply:I don't know that they would let you even swap for bigger one but if they are still in the current inspection period I don't see why they wouldn't allow you to trade them fo bigger ones if you paid the difference.1973 Lincoln SA 200, Already replaced shunt coils, Idle board (SOLD)1984 Miller Dialarc 250HF, Miller water cooler, 250 AMP water cooled torch, you know the worx.
Reply:so any results yet on your practicing pwillis?1973 Lincoln SA 200, Already replaced shunt coils, Idle board (SOLD)1984 Miller Dialarc 250HF, Miller water cooler, 250 AMP water cooled torch, you know the worx.