- Welcome to another episode of weld.com.
We're doin' a series of two inch, Schedule 80,
pipe welding videos.
In the first episode, we did the root only.
We did the root, made a mistake,
showed how to do the repair.
In this one, we're gonna do the fill and cap.
So, first thing I need to do
before I go from root to fill,
I need to wire-buff this out a little bit.
I like to clean it up.
I'm gonna be using an encapsulated wire wheel.
This thing looks like a flat sanding disc or buffing pad,
but this actually a wire wheel.
It's got some product around here
so it doesn't spit wires.
I've hit the camera guy with a wire every now and then.
So, the first thing I need to do is clean this up.
I'll probably come out here,
I'll probably stay just in the groove,
because again, I'm just doin' the hot pass
or the fill pass on this particular run.
Then we should be able to go to a cap after that.
(whizzing)
Okay, I'm ready to commence a run here for a fill pass.
We did the root at 1-0-5, with 3/32 wire,
at about a 1/16 gap.
Now, I want to, I'm lookin' at what's left
as far as the amount of fill.
I have chosen a 135 amps and an 1/8 inch wire.
Simply because, I can spend some time out here
in the bevel phase.
What I want to avoid is suck-back.
Suck-back is a condition where I have remelted my root
and it draws back inside where it's concave,
or has some concavity.
Instead of reinforcement convexity
on the inside of the pipe, now I have a concavity.
I want to avoid that.
So, I'm doing it by going to a larger size wire.
Again, it's a combination
of how much filler wire I'm carrying up here,
what I want my bead to look like when I get done.
I personally, just wanna bring this up to the edges
and leave it kind of flat,
so that when I put a cap in there, I get a gentle crown.
Again, 135 amps, I'm on fixed amperage.
So, when I strike the arc,
I'm puttin' the wire in here
and manipulatin' the tungsten,
and my angle, and my travel speed to get what I want.
Okay, that was my fill pass run.
So, now I need to buff this off
and I need to come out here and make sure
that I take mill scale off or the cosmoline,
whatever's on the pipe here, next to the beveled edge.
Get everything cleaned up.
Then we'll do our cap pass.
For me, I'd like to let this cool off a little bit.
I'd also like to decrease the amperage
and go back to a smaller wire.
I could've put the fill pass in with a 3/32,
but again, I was trying to avoid runnin'
too hot of a pool,
so I grabbed the bigger wire.
Now, I'm gonna decrease the amperage
and go back to 3/32 70S-6.
I like to cut these down when I'm doing small bore wire,
or small bore pipe because it's just
a little easier to control.
I also...
Oh, they're not that bad!
They just look like they've got
a little process oil or pickling oil on 'em.
I just take a piece of Scotch Brite.
(zipping)
I like to wipe these down three or four times.
Also, like to run 'em through my shirt and wipe 'em off
and they seem to...
A little black came off there.
No big deal!
They just seem to run a little smoother.
It don't get pond scum on the leading edge of the pool.
For this, I have switched back to a number eight cap,
because I wanna ride this cap on my bead,
and I just wanna gently roll it back and forth.
Okay?
We'll talk about cup sizes here when we end this video.
We'll talk about the products we use to complete this run.
(hissing)
I heated up the leading edge of my pool.
(hissing)
I wanna keep the wire right on the leading edge
and roll back and forth across it.
(hissing)
Fairly tight weave.
(click)
This pipe is hot enough
that I have my forearm against it,
and it is uncomfortable.
(hissing)
And we have a finished weld!
My edges are pretty well fused in.
I'm fairly straight and consistent on the way up.
I have a gentle amount of reinforcement on here,
that is above the pipe.
Not the prettiest, but it'll work!
Now, we'll buff that off
and we'll talk about how we got to this point.
(whizzing)
All right, let's go back through this a little bit.
This particular sequence was the fill and cap.
So, I already had the root in the pipe.
First thing I wanna talk about is cups and cup sizes.
Some folks will do this with a gas lens
and a number 10 cup, all the way out.
That's fine!
I just chose to do it with simple, standard components.
I did the root with a number five cup
so I could wiggle it inside the groove.
I believe I did the fill pass with a number six cup,
so I could again, ride right on the,
barely catch the beveled edges.
Then this last pass,
I chose to go out to a number eight cup,
so I could gently ride it on the weld material.
I was gently rockin' this back and forth.
That's my travel.
Okay?
I got a fairly tight weave.
You'll see some beautiful pipe runs
out on Instagram and Facebook,
where guys are makin', just an exquisite pattern,
I mean, it's like pure eye candy.
On the small stuff, I like to kinda make mine small.
So, I don't stick my tungsten out very far.
I gently ride that on there
and kinda wiggle it back and forth.
Again, my whole deal is,
I gotta catch these edges
and I gotta leave some reinforcement on the pipe.
I chose to go back to a smaller wire.
I did the fill pass with an 1/8 inch wire, at a 135 amps.
I decreased my amperage
and went back to a 3/32 wire
and did the cap.
I didn't wanna carry a whole bunch of metal on it.
That's all I did.
So, that concludes the two inch, Schedule 80,
fill pass and cap.
Okay?
They're really not hard.
Again, the pipe heats up so you gotta deal with that.
I was over here doin' the cap,
and I had my forearm rested over here.
I was about ready to squeal
'cause it was heatin' up pretty good.
There's a lot of products out there.
You can lay another glove up here.
I went through this fast enough,
I tried to let it cool off some, but not enough.
Anyway, not hard.
Get comfortable.
Maintain that correct tungsten angle and filler wire.
If things happen, relax.
You know, they're gonna happen.
I kinda taught myself pipe welding,
and it was frustrating.
You just gotta get past that level of frustration.
Relax and be confident about what you're doin' and practice.
It'll come to ya.
This was a two inch, Schedule 80,
5g, or vertical weld on this pipe.
The next video is going to be the horizontal weld,
or 2g position.
Same diameter pipe, same schedule,
two inch, Schedule 80.
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