2" stainless pipe

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3/32" 308l wire, 65amp,  dynasty 350rootfillerlook good or no?
Reply:ztfag...... no but thats a diff class....but deff good absolutly better then me i suck at ssLast edited by himsa169; 01-20-2011 at 07:12 PM.
Reply:I'm going to cap it Monday then i'll update the picture :]
Reply:looks very consistant, but it may need a little bit more penetration.
Reply:Originally Posted by gto_welder01looks very consistant, but it may need a little bit more penetration.
Reply:Doesn't look bad at all. Walking the cup is a lot of fun.
Reply:Originally Posted by SR20steveAs long as its flush your good to go
Reply:Originally Posted by gto_welder01in my opinion it needs more penetration...if you leave it like that at one of the testing facilities here in houston they will not pass it visually, even though it might pass x-ray.  im just saying a little bit more penetration wont hurt it any, it will only help you.
Reply:Originally Posted by gto_welder01in my opinion it needs more penetration...if you leave it like that at one of the testing facilities here in houston they will not pass it visually, even though it might pass x-ray.  im just saying a little bit more penetration wont hurt it any, it will only help you.
Reply:sweet this stuff is no where near as easy to feed the wire into as carbon steel is..
Reply:Originally Posted by justinTsweet this stuff is no where near as easy to feed the wire into as carbon steel is..
Reply:Root looks good in my opinion. Have to see it all the way around to know for sure. As long as you have 1/16" reinforcement on the inside, your good to go.Looks very consistant on your root and fill (very important in pipe welding). Very little undercut that I can see (also very important). Your on the right track for sure.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:thx snoeproe!! I have about 200 coupons to practice with I'm lucky :]
Reply:@showdog75 really? maybe I'm just not used to it.. That was only my second piece of stainless to ever weld. Hopefully I'll get the hang of it this week
Reply:here is the cap
Reply:Was it pipe or tubing?What was the diameter of the filler wire????For a 2 inch pipe or tube you do not need to "walk the cup."Try to just TIG it without "walking the cup"Sounds cool.... but not necessary.Many young welders say "I know how to walk the cup" to impress me and make me thinkthey really know their stuff.They do use that method  on large pipes where there is a large gap.Last edited by Donald Branscom; 01-24-2011 at 07:10 PM.AWS certified welding inspectorAWS certified welder
Reply:its 2" thin wall pipe, 3/32 wire 308l, about 68amps.. I need to learn how to stop the holes in the weld after I pull the arc away they are really bad on the root, and I know they wouldn't pass. Any suggestions?when i walk the cup i get a more consistent bead/fill
Reply:The weld sag seems to have made a cold toe on the bottom where the weld rolled over.You may need to adjust your torch angle and add filler from the top.  You may also need to speed up a bit.
Reply:Looks like u have suck back. The inside should look like your cap outside, a bit raised. That root would never pass any test
Reply:When your finishing a certain pass you always ALWAYS have to "feather out" to prevent crater holes, cold cracking etc. Example: when finishing your root and you have sufficiently filled any sort of crater at the end, trail your arc and puddle up the side of the bevel and then quickly extingiush the arc.
Reply:Many welders go into the welding store and are going to buy filler TIG cut length wires.They buy what is on the shelf.Secret.For 2 inch STAINLESS tube or pipe and a 3/32 tungsten you need to use .045 diameter filler wire.Otherwise you will have trouble.But you have to order it or ask for it at the welding store or online.Do NOT just buy what is offered to you because it is all they had.For STEEL you can use a little larger diameter wire.3/32 filler wire is  TWICE the diameter (.093) of the .045 stainless filler wire  so what happens is that when you dip the filler wire into the molten pool it deposits too much material and cools the weld pool down too much. It slows you down and can cause poor penetration and excessive build up.The filler wire diameter is critical.That is why on the weld shown there is not enough weld to fill the groove and because you used the "walk the cup method" on the root pass the weld is wider and now. There is not enough room left for the covering pass in ONE more pass. You would need two covering passes (one on each side to fill the groove) Then you will have put way more heat into the welded joint than necessary for that size pipe or tube and there would be another empty groove in the middle.If you had made your root pass with .045 filler WITHOUT "walking the cup", then the covering pass could be made in one pass for that small 2 inch diameter tube or pipe.PHOTO of a regular TIG weld on a small diameter tube.Last edited by Donald Branscom; 01-25-2011 at 09:56 AM.AWS certified welding inspectorAWS certified welder
Reply:Agreed with donald,ALot of guys always run around saying " i walk the cup " and i feel as though alot of younger individuals see this and figure its the right application for any tig on pipe situation. Small diameter piping including heavy wall can be done free hand. In my opinion freehand roots/fill/cap take more skill than resting the cup on the pipe and working it back and forth. A vast majority of pipe work you are in a situation that you arent able to walk the cup myself i am a maintainece welder at a very large coal fired generating station, and theirs absolutely no way you can walk the cup in the boiler due to the tight vicinity of the tube locations. You will be further ahead and become a more diverse welder if you teach yourself to freehand roots with both hands, WITH no pedal or dial on the torch for heat adjustment. Learn to use your pipe, filler, and travel speed as "small" but effective means of heat control. Also maybe to add to donalds post if your going to eventually be getting into xray joints, get yourself into a routine of wearing clean non greasey tig gloves, and use emery cloth on your tig rods to eliminate any contaminants. Clean is your friend!
Reply:I agree on using smaller filler but .045 is abit small for me. Most of my small joint work is done with 1/16" filler. I will see if I can dig up a old thread of mine with pics of me free handing some .440 wall 347 stainless 2" tube[100% xray of course].Walking the cup is a waste of time on small diameter tube/pipe. You can carry ALOT more metal free handing, bigger tube/pipe is a different story though.http://weldingweb.com/vbb/showthread.php?t=41811http://www.millerwelds.com/resources...t-I-do-at-workLast edited by Showdog75; 01-25-2011 at 04:24 PM.
Reply:wow thanks for all of the useful information!!!I always free hand my root in that is the way I was taught. I just run the tungsten directly over the top of the wire while attempting to feed it into the puddle, now i will try it with smaller wire maybe ill have a little more control.Thank all of you for the help!!