- Welcome to weld.com.
We're doing a series of pipe welding videos.
This series, with the two inch, Schedule 80,
is going to be 7018 low hydrogen fills and caps.
We've already done the TIG Roots in these,
so we're gonna use these coupons to do our fills and caps.
This particular video is going to be, kinda,
gettin' started confidence builder.
We're gonna weld this in quarters.
We're gonna stop, clean it, come up to the top.
We're just kinda rollin' this one out.
This would be the easy one to get ya started,
build your confidence.
From there, we'll do 5g,
start at the bottom, go to the top.
We'll do 2g, wrap around.
We'll do a 6g, okay?
Seventy eighteen, gonna run off a Rebel 285.
I'm gonna run 75 amps.
Couple cool products here, to prep the inside of the pipe,
before we did the TIG Root, roll cone, poly-v flap disc,
got an encapsulated wire wheel.
These things are kinda cool.
Keep the wires concentrated.
Keeps 'em from spittin' and it keeps 'em from flarin' out.
Cool product!
We can get by with doin' this
with probably a file and a wire brush.
We might even be able to get it done
with a wire brush alone.
Let's get to it.
Couple of different ways here that we could start out,
when we first strike the arc.
We could strike the arc low in the groove and move up,
and initiate our bead.
Or, we could strike the arc and draw it down a little bit,
like we do on any restart, then come up to the top.
Very important that I maintain reference
to the center of the pipe.
What I don't wanna do is strike an arc
with the center of the pipe
and never make a transition and come up here.
I'm fingernailin', I'm pushin' the rod really bad.
Always gotta make that transition.
It goes quickly on small diameter pipe.
So, the first one I wanna do correct.
I wanna reference the center
of the pipe and make this transition.
The second time we strike up, the second rod,
will probably just do this and do it wrong.
And, see what happens.
See if it kinda blows out
and gets unstable and gets weird.
(crackling)
Whoo!
Seventy-five amp!
Might be a little hot!
(crackling and whirring)
Had to stay movin' with a short arc
into the sides of the pipe metal.
I wanna leave room for the cap.
Whoo!
(whizzing)
Might be a skosh full.
I like to have these just a little bit under,
so I may end up turnin' this down.
I'm gonna run this second rod
and I'm gonna start out correct as far as rod angle,
but I'm never gonna change it.
I'm gonna get up here.
What I expect to happen,
is gonna fingernail or blow out the bottom of this rod.
Make a mess, maybe.
I don't know, we'll see.
I won't be directing my arc into the groove.
I can tell ya that.
(tapping)
(crackling and whirring)
Okay, so on that one, I restarted the arc,
blended in to what we had before for the,
this is just a fill pass.
But, I never changed the rod angle.
So, I started like this, I came up here on top,
and my arc was like, blowin' out of the bottom of the rod.
And, it made it real hard for me to see
what was goin' on in the weld pool,
and it also just got real wide.
So, essentially, I lost control of the weld pool.
Did it weld?
Yeah.
(whizzing)
Just came up and got real wide and it's flat.
You know, I just don't care for it myself.
The end of the rod, it got a big ole knob in here.
This is where I start suspecting things like porosity.
I just watch the arc itself
and it's just like vaporizin' all this flux,
and it's blowin' out the bottom,
and it made a big ole knobulous wrecks on the end,
crusty.
I just see problems.
So, again, always reference the center of the pipe
and make that transition.
On small pipe, seems like right when you strike the arc,
soon as you start movin',
you're startin' the transition.
You gotta make that move.
Right, let's carry on here.
To continue on, I personally like to strike the arc up here,
let it get goin', come down
and weld back through my arc strike.
(crackling and whirring)
Let us continue on.
I have turned my machine down to 70 amps.
I know some of you may think that's a little low,
but don't be alarmed.
I don't wanna overfill this.
I don't want this to get away from me.
It filled up a bunch.
Again, this is just two inch, Schedule 80.
So, again, I wanna strike the arc slightly above
and then I wanna come in here and commence my cap run.
I'm not one to weave outside of the bevel.
So, I wanna watch the edges
and I also wanna watch the crown.
Hopefully, I don't get it too tall.
(crackling)
(crackling and whirring)
(whizzing)
So, that was the first bead of the cap.
I'm gonna rotate this down.
I will strike the arc slightly above this,
come in and blend into it.
Take off again, come up to the top of the pipe.
I don't think I wanna run the entire thing.
You'll get the gist of how to do this.
Again, this is a confidence builder.
Just rotatin' and stayin' up here,
and gettin' used to bein' on pipe.
(crackling and whirring)
All right, a couple things, that's the cap.
My goal, as far as the edges,
I don't want any undercut.
Ya'll are dingin' me crazy on that.
I'm tryin' to not get it above an 1/8 of an inch high.
You know, underfilling it helps
when you're in a vertical position,
especially comin' up on the sides and off the bottom.
One thing that I do, some of you may notice
that I will take a rod,
I'll put it in the electrode holder,
then I'll bend it 90 degrees.
That allows me to kinda get
into a lot of different positions.
But, more importantly it helps me do this.
When I strike an arc and I'm makin' that transition,
when I come up here on the very top of the pipe,
lot of times I like to be pointin' the rod like backwards.
Almost like I'm draggin' it
because I want that slag to be back away from me,
away from my direction of travel.
So, it's real easy for me
to just rotate my hand like that.
Okay?
So, it's just one of those personal things.
Try what works comfortable for ya.
Get confident.
Practice, practice!
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Ah!
Yeah, yeah! Huh? - [Man In Background] Action!
- You said that.
I was already goin'!
What do you want now?
I thought we were gonna (beep)!
(laughing)
Oh my God!
They're gonna beep this out!