Stainless Steel *TIG* Pipe Welding No Gap 2" 

Bro thank you very much, nice to see someone appreciate what im doing

@@ARCONEWELDINGeveryone in here is an idiot, you have a job that gives you years of work, I think we all know who the professional is, us real welders that is.

Thanks dude

hey man new to welding whats the best amps to do sch 10 piping

@@aarondunne2932 I never welded sch 10 before. But if I would guess, probably 40-45

Sch. 10 I like to do at 60 amps. With a 1/8” gap. I cap at 85A after it cools down. A common misconception is that you don’t want to add too much heat but you also have to think of the duration you’ll be welding for compared to a slightly higher amperage at a good pace.

@@aarondunne2932 procedure we use for sched 10 pipe where i work atm is 2mm to 4mm gap (depending on size of pipe) Obviously those tacks shrink a bit as the tacks cool. Purge (argon) then set a 10 to 15 litres per minute. 1.6mm filler, 80-90amps. Fast travel, filler into one side then pull it across the gap. Then same amperage to cap it off once cooled below 150°c interpass temperature. Works a treat👍

​@@aarondunne2932 sch 10 is not a standard thickness, it is all relevant to the pipe diameter. 2"NB sch 10 will be of a thinner wall thickness than 4" sch 10

Thanks bro ✊🏽

In the US we have the Miller Dynstay series which I believe use Fronius boards. I love my Dynasty 280.

Thanks for this trick! To be done does it need a purged pipe?

Indeed, TIG looks harmless but it's def not! if you're welding tig pipes it's exotic alloys most of the time with high chrome/nickle rates. Fuck that I'm wearing my adflo lmao

@@panzerfaust7672 where ive worked for the last 4 yrs (ish) now, even carbon pipe is tigged. Up to 3" most of the time is full tig, 4" and up is tig root and hot pass, then usually 7016 fill and cap. I wear my airfed all the time out of habit, i dont wanna be breathing that crap in all day long lol. Unless i cant get in to see what im doing, than it's a job for a normal headshield with a p3 filter mask underneath👍

Steve thanks man you too

@@ARCONEWELDING N.I.G.A.👹👍

Agree, no master here by any means, I TIG a fair bit of thin stainless, hot and fast - less time over target and less cooking. 👍

Yeah dude it's a work in progress for me

Not true, pipes are darker cause they get less gas coverage than the socket weld because of the angle. SS Almost always turns out that way unless u get a bigger cup or run slower which isn't ideal for that diameter of pipe. Do agree that prepping is important though. Source : Weld SS for the food industry for a living

@@matthijsb.9573 I also weld sanitary pipes for a dairy processing factory. Didn't you notice the pipe he's welding? It's stainless steel but it has a thin layer on it similar to 309 stainless steel.

Looks like he's using Nitrogen for his purge. Pure argon is also commonly used

Pure argon is usually used for tig welding unless heavy aluminium (argon/helium mixes) or heavy austenitic stainless (argon/hydrogen mixes).

I will answer my own comment, since a lot of time passed I got some new insights. I have just welded 1.5mm 12mm diameter pipe for a certificate, I must say it wasn't perfect, but some places looked nice (of course it was good enough for certificate, but I think now I could do better) although generally anything 2mm and lower can be welded in one pass, one pass usually accumulates more heat, best results would be to weld it once without adding filler rod and let it cool a bit. now when it is done I drop amperage a bit and weld a cap... what this does is the first pass is a great heat bridge, and since you do not need to penetrate now you can drop the amps a bit, if you waited on that pipe for around 10 minutes or less it is absolutely insane to weld the cap with the same amperage or higher.... if you cool it for longer you loose time and will have to weld with higher amps and faster... Have a nice day and feel free to criticize me. P.S. for something even thinner your machine minimal current setting may still me overkill, but I found that I can weld 0.7mm pipe by putting the machine on 25A and high frequency pulse... I do not know the frequency exactly as my machine doesn't display it but judging from the sound it was above 50Hz, perfect penetration, perfect cap, single pass, must be careful with supplying the rod..

Try looking for pressure vessel or pipe work!

I struggle to get pen when i lay wire

@@ARCONEWELDING i have been there haha, just watch the puddle

Watch for the dancing ladies. Once you see that pool start swirling on both sides then you know you have penatration.

Lay wire is good on a fitting you can see in after rooting it but for field weld stuff in power, and chemical plants we always either back feed or key hole because you know for certainty it’s all tied in. Lay wire is just to risky when they X-ray everything and you can’t see the last quarter of the root.