Welcome to X3M TIG
Miller PipeWorx 400
Today I'm going to weld on, 18" XH Chrome Pipe
We got 3 heavy tacks on, 3,9, and 12 o'clock.
The gap is loose 5/32 with 1/16, land on bevel sides.
Tig Filler wire ER80S-B2
5/32 Tig wire for the root part, I'll be feedeing from the top
Keeping the rod slightly above the edge of the land
and pushing into a puddle, while I'm progressing
my way up.
For this type of chrome pipe,
No backing gas is needed, and preheat is,
120 C* or 250 *F
A temperature indicating stick, instantly melts,
when it reaches the designated temperature.
Hitting that exact temperature
is important to make sure your weld is solid.
I prefer my Tungsten stick out, to be the length of the bevel
I like to use that as a reference, to freehand my root.
150 Amps for root, up to 9 o'clock
Pushing 5/32 tig rod. while moving torch side-to-side
Very Important to use 5/32 rod on heavy wall pipes
It will give you enough metal deposit inside the root
so you don't have to worry about root suck-back on your,
Hot Pass
Very common with TIG welding and
causes Root concavity by shrinkage of the weld pool.
As you can see, we got enough meat, in and out.
This is where we going to stop with 5/32, and switch to 1/8
Now I'm going to feed rod
by positioning on the outside edge of the bevel, and
using dipping technique
Pushing rod on each side of the bevel
With that technique, you can see that your edges are burned
and you can also monitor amount of rod you are deposit
I've been using this technique for years, and never had
any welding failures in years.
Root looks solid, and ready for a hot pass.
Only little problem we have here
The outside appearance of the root pass,
Looks a little bit greasy, oily!
Run grinder or buffing wheel to clean that pass
For Hot Pass, I'm running 160 Amps 1/8 rod
Keep your Tungsten always sharp it will be easier
to manipulate or control your puddle with ease.
Cup size for the first pass is size " 8 "
I'll be using size "12" for the second pass.
Once you are done with the first pass use buffing wheel to clean
Now I will switch to a cup size "12"
walking the cup side to side a motion making one weld bead
At this point, I'm using 200 Amps and two tig torches
Tig Torch I'm using is good only for 250 Amps, so
I need two sets
I got set up one torch for each side of the pipe
so you can cool off one torch, cuz they get HOT
After 3rd pass, we can start filling sides
Same 200 Amps
U can use 5/32 to fill out faster
Now switch to another side and start filling.
I slowed down welding recording so you get
better picture
Try to maintain the same width so you can fill it up
Properly
It's a good habit to clean your passes as you go
Continue with filling side all the way to the top
Control your puddle, and avoid going over the edge.
Remember Tungsten always sharp and clean your passes
Same thing but on the other side.
This way of dooing passes makes you fill faster,
and most important, clean, and solid welds
With 100% X-Ray Quality...
Always stay on top of your WPS...
Pay attention to your interpass heat input
In my case is max 310 C*
Now we going to fill that middle grove.
At this point, I'm running 250 Amps and torch is,
Melting
Unfortunately, I got only Air-cooled torches.
With water-cooled torch no need for two sets.
Go wide as you can with this middle pass
Now we going to fill to the top edge
I speed up the process, and filled up both sides
I will run one more pass in the middle until is flush
With this fill passes we can have nice capping.
Weld is flush all the way around.
Even if you got some uneven spots,
you can always add some extra weld to make it flush.
I will start from the bottom, and working my way up
With first cap pass.
Once you got first pass in
Plan your second bead to cover the half existing first one
And the rest of the puddle, leave enough room for 3rd
Pass
To get end results excellent, control your puddle
That being said, keep your bead straight, and width same
A good weld is easy to distinguish.
It will be straight and uniform
There will be no breaks in the weld.
Just master to have excellent control.
And your every weld will look pretty...
For capping, I'm using 160 Amps, and 1/8 filler wire
I always do one side first, but it's up to you,
What you like or what is easier for you.
Hope you guys find some useful information
Or learn something new
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Thanks For Watching...