Open root welding?

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i need some help understanding open root welding for example i know the root pass goes in first and that gives you the full penetration but what does the hot pass do? and are their any tips or words of wisdom some experienced welders can give?
Reply:The hot pass is the second weld of the joint, just after the root pass. Most open root stick welding is done with 6010 and often times getting all the slag out of the root pass is hard to do. Setting the amps up a little for the second pass (hotter than the root pass) can help to burn the slag out so that you don't leave any inclusions.Airco Ac/Dc 300 HeliwelderMillerMatic 200 (stolen)Miller Maxstar 150STLMiller AEAD200LE (welding and generating power) Hobart MIG
Reply:thank you for that i did some open root welding today with 6010 i enjoy all the tips i get
Reply:I have used the hot pass to help push in the root pass a bit more if it needs it.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:Originally Posted by snoeproeI have used the hot pass to help push in the root pass a bit more if it needs it.
Reply:Depends.....you may not need to turn the amps up at all.If you run your hot pass up, that will push in the root pass. If you run your hot pass down, that wont push in the root pass so much.Some places require you to run all your passes up. Some don't.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:What size rod is better for open root? 3/32 or 1/8? 6010 or 6011? I practiced over the weekend and I just could not get full penetration weld that had some reinforcement on the back side. I will admit i'm a lot better with wire than stick and cannot open root vary well at all.Lincoln pro core 125 14''chop saw7 inch grinder,2-4.5 inch grinders,electric die grinder.Half inch drillAnd alot of hand tools
Reply:What size pipe, , bevel, lands (flat area at "tip" of bevel) and gap?
Reply:Originally Posted by snoeproeI have used the hot pass to help push in the root pass a bit more if it needs it.
Reply:I do agree you don't know most of my open root is on production line repairs . Magnetized and in a race to get bottom sealed before oil runs out.my hot pass is on the verge of blowing through or out sometimes I don't know if it would pass X-ray but it works .right or wrong hardly ever leaks
Reply:Originally Posted by flux core joeWhat size rod is better for open root? 3/32 or 1/8? 6010 or 6011? I practiced over the weekend and I just could not get full penetration weld that had some reinforcement on the back side. I will admit i'm a lot better with wire than stick and cannot open root vary well at all.