5G and 6G Pipe

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I am in college for welding and started pipe FINALLY last monday. I was wondering if i could get any pointers or any useful info?
Reply:Come back with some specific questions, and I suspect you'll get more answers.  What you're asking is too vague.  Post details like what process(SMAW, GMAW, FCAW, GTAW), filler metal, and equipment settings along with your question.  Then people can give you good, specific advice.Good luck.Benson's Mobile Welding - Dayton, OH metro area - AWS Certified Welding Inspector
Reply:Well this 5g and 6g pipe is being welded using SMAW. Its a 6010 open root with 7018 fill and cap. My main trouble has been with the transition from overhead to vert. up.  I am using a lincoln idealarc 250. Thankls to all hope the more info works.
Reply:Try on your root with 6010 to weld in a keyhole with lower heat and dont be afraid to push it in a little,  always keep a good leading angle on the transition into vertical.  When your ready for your second pass (you've got all that 6010 ****slag ground out) run your first E -7018 in nice and hot keping a slight weave level especially on the 6G (this way you avoid slag entrapment and under - cut)
Reply:Clean all your tacks really well (feathered out  to a point) 1/16" land. About 62- 65  Amperes on 3/32" rod, assuming you are doing a 2" Sch. 80 Pipe keep a good lead angle on the E-6010 root keep a slight gap on the arc (about 1 1/2 times your gap on E-7018) I like to weld in a slight keyhole for E-6010 Stop @ the 9 o'clock and 3 o'clock positions respectively clean the crater of the weld out really good then do the verticals from 9 o'clock and 3 o'clock in order to minimize heat transfer. Grind all the crud from E-6010 slag until you can see no dark spots at all at this point turn your machine up to between 82 - 87 Amperes and run a nicehot pass in on top of that E-6010 Sugar,Honey,Ice ,TeaLast edited by ol' Stick Guy; 04-19-2009 at 08:03 PM.
Reply:Thanks ol Stick Guy. I am doing 10inch  daimeter pipe that has a 1" wall thickness. But all the advise is helpful.
Reply:10" O.D and 1" wall you should be able to get away with a 1/8" E6010 root at least 3/32" gap and landput a little pre-heat on the pipe just outside of the Heat Affected  Zone to prevent excessive carbon precipitation (our Pipe Test procedure allows 250 deg. Fahrenheit) if you put too much heat or an oxidizing flame directly in your root opening you will BURN the metal and have a scaley inside root.  When you start filling up on a heavier walled pipe like that you want lots of heat (residual heat) to avoid distortional cracking, so keep your sides of the weave slightly longer in the corners (perhaps a1-1/2 second count rather than a typical 1/2 second count. Also load up your grinder with a "soft"1/4" stone and remove any dark spots you see.
Reply:Allright. Thanks a lot again. i have been doing different positions. i did a 1G roll, and today i burned my 5 and 6 g Pipes apart and started a 2G and am having no difficulties with it.
Reply:dont be afraid to let stuff cool off when you are finishing up passes  it is better to take time letting the pipe cool  then trying to quickly finish it off and cause a burn through because it got toooooo hot.
Reply:put you a 3/32 gap and and about a 1/16 landing and run that 6010 downhill youll be surprised how slick it goes in there you dont have to jack it or any thang if ur fit is good and its much faster and in my opinion it goes in way betterComplete Fabrication Shop specializing in pipe fabrication. Also offering heavy steel fabrication and sheet metal work.
Reply:Yeah i have learned that fit-up is key. But your right a downhill 6010 root is fun almost because of how well it runs in there. 5/32 Rod Right??
Reply:Just run whatever they want, 6010 is sweet  I'd rather be hunting........USE ENOUGH HEAT.......Drifting around Aussie welding more pipe up, for something different.....wanting to get home.
Reply:nah 1/8Complete Fabrication Shop specializing in pipe fabrication. Also offering heavy steel fabrication and sheet metal work.
Reply:The real key to learning to weld pipe is lot's and lot's of practice, and don't be afraid to try different things.The difference between art and craft is the quality of the workmanship. I am an artist.
Reply:Originally Posted by CrickertjYeah i have learned that fit-up is key. But your right a downhill 6010 root is fun almost because of how well it runs in there. 5/32 Rod Right??
Reply:Originally Posted by JTMcCYea, on downhill pipe that size you'de definitly be running the bead with 5/32". Hot pass thru cap would be either 3/16" or 5mm.JTMcC.
Reply:Originally Posted by scubaholicthe job im on now is 36 in and 24 in pipe and we are all using 1/8 6010 for the root the only thing we are using 5/32 for is slip on flanges where the pipe isnt exactly round and you have quite a gap in places
Reply:Thanks Guys My school year is oficially over but im meeting my instructor next week to keep welding in the shop and keep practice pipe more. Next Year in school is all pipe.
Reply:Lincoln electric web site sells a group of posters that tell alot about rod angle,keyholes, spacing, tacking. very good stuff I bought them and hung them in my office to study while taking a break.If it's too . get an office jobLincoln wp225g7 Lincoln 250 idealarcFrankenstein O/A set-up Weld-tech  tig set-upLincoln sp 175 plus profax  arc gouger
Reply:here are some Attached ImagesIf it's too . get an office jobLincoln wp225g7 Lincoln 250 idealarcFrankenstein O/A set-up Weld-tech  tig set-upLincoln sp 175 plus profax  arc gouger
Reply:These are helpful we have them in our shop at school.