Hello everyone and welcome to the X3M TIG channel In today's video guys, I'm gonna show you a technique
that will never fail you no matter what material type you're using works on Chrome Works on carbon
and works on stainless steel material so for example here I got a 42 inch this is Chrome P5
it's a vertical weld a half inch thickness of material
connecting the flange or reducer to the bottom of a reactor
as you can see here the pipe is already tacked by day shift as we're working in the two shifts to
get this thing done Chiclets are already installed it's a 350 Fahrenheit preheat
as you can see Gap is not perfect we try day shift try to open a little bit
so we gotta lose 1/8, 5/32 Gap
as you can see here the bevel is kind of straight it is a feather edge
okay now I'm gonna for the purge I'm gonna use a five Purge hoses uh with a diffuser on the top
I'm just gonna connect insert to a two-inch drain we got here at the bottom and I'm just gonna tape
with aluminum tape just in case if they don't start melting in a case of heat or something
as I said the Gap is not perfect it's a half-inch thickness a 42-inch pipe
the main goal is to put the root in and wait for its closure weld procedure so with the closure weld
procedure after root they got to do MT on the root pass and then after that you go to
do a hot pass fill and cap as I said 350 we're waiting for Chiclets too they're gonna probably
bring the heat up a little bit as you can see that temp stick is not melting so the temperature is
not reached yet so we're not allowed to weld in the meantime we are purging with the five
five hoses of around 60 liters per minute on each hose it's connected to the argon manifold
it's taped so will let like for an hour and a half approximately we
got that one inch on the top that's for the vent, we set up dams inside
it's a big job
especially with the big pipe I like to do the big pipe but there's lots of work
as for my side as I'm working with a partner he's doing one side I'm doing the
other side I'm using the two torches 150. amp rated each torch a standard size #8
cup with a 1/8 tungsten the Purge seems all right we've been purging for an hour and a half
two hours already so the purge should be good and we're just gonna start welding he's going
to start welding at the bottom I'm going to start welding on the side, the 135 amps for the root pass
the techniques I mentioned earlier on the beginning of the video this technique that
I already showed in previous videos I like to use this, especially when you get uneven gap especially
when it's 100 x-ray it's a dipping technique guys uh that technique will never fail you
uh you just have to adjust your travel speed that's the most important thing here
you don't want to pause too much it might just drop down, you can open even more
that creates even bigger gap for you the most important thing is to adjust the travel
speed adjust your settings adjust your amps that you can actually handle and side to side deep
each time you're not going to fail you're not gonna have any issues the wire will do the rest
the main thing is to burn those edges break those walls and fill them with a wire
as I said the dipping technique is the best especially on stuff like this
you can do lay wire as well here but then you have to go fast 5/32
not saying you cannot do it you can but for for a high low and for an uneven Gap like here
a dipping technique definitely is a technique to go, as I said this is a Chrome example you
can do on a carbon you can do on a stainless steel I did on a on all of them never had any
issue and you're never gonna fail so the main idea is to weld in between tacks as we were
both work on a on the opposite sides we don't want to insert any air inside we don't want to grind
so the idea is just weld between the tacks
and once we're both done with the with the root between tacks
then we're gonna cut out the tacks with the grinder
so for the Stop starts
stop starts always preheat your start
as you can see here I'm traveling a little bit faster 135
especially on one side, I get like really straight edge it is beveled it's a feather edge but
it's the bevel it's not 37. 37 angle degree it's just a straight edge
and he's still doing his side and he's about to be done
once he's finished then we're gonna then we're gonna cut the tacks out
as I started on the top he was on the bottom now waiting for him
to finish then I'm gonna switch to the bottom and finish on the bottom
it's a little bit tighter here but it's still a loose 1/8
as long as you can wiggle that 1/8 rod in between the Gap that's a good Gap nothing wrong with it
just breaking the walls and adding adding that wire the good thing with the dipping
technique you can control the amount that you're actually putting in that root
for the bottom section might work a little bit different if you want to keep
it inside that bevel inside the root when you're doing overhead
but
you can do the dipping technique as well on the bottom part
the only biggest the big issue with a big pipe when you're welding
especially at the bottom part especially on the overhead part
you don't have that you have to fit a long wire you have to keep it inside but because the
diameter of the pipe you know have that it's a little bit harder to control so it might give
you a little bit of issue it's a good habit if you cut the wire in half and then keep it inside
okay now we're going to cut the tacks tacks are cut out once you cut your
tacks try to clean your bevel inside so you don't want to have any obstacles
especially for the hot pass later, you don't want to have any obstacles so you can walk the cup
set up The Purge is still running same thing just gonna
Grind All stop-starts, have to remove tacks cover it again with the tape and then
we can start, usually around half an hour, 45 minutes should be good as
you can see here so as I said for the Stop starts and preheat you start point and
then when you go on a tie-in point you just go over it like half an inch adding wire as needed
I'm still on a 135 1/8 rod 80S- B2
as I said this is a chrome P5
the most important thing with especially for a the existing part of this pool it's because
the product that was running inside you really want to clean that at least five inches from that
edge of your bevel you want to really have it clean the issue with stuff like with the big stuff
like this
you have to have a proper PP good leather jacket or a leather sleeve so you can
that's what I like to do is then when I'm holding my wire, when I'm adding wire, feeding that rod
I like to put my hand and my Knuckles on a pipe and it's getting too hot you know you might
start shaking and it lose a little bit of control just the main thing is just to support yourself
okay as I said here on a tie-in go slow any time add wire is needed and then just go over half an inch
okay now I'm just gonna finish the last part I got on the bottom
and that's it my part is done I'm just waiting for my partner to finish
another side they're making calls for QC they have to do MT on the root pass
as I said this is a closure weld procedure and a good habit just to run the grinder a little bit
on your root pass just in case if you dip any tungsten around so you just want to get rid of
that is especially for the X-ray later so 180 for the Hot pass same Rod size 1/8. cup still one eight
tungsten 1/ 8 and a cup size 8. as long as the the cup can wiggle inside and you can actually
move nice and fast you can switch maybe to size 10 depends from the from the gap size
but in this case, cup 8 is good
180 for the hot pass I'm not really worried about the Suck back
as uh root, the only thing guys uh I forgot I forgot to take a shot video, record my actual
root inside, on both sides of me and my partner. they were really excited to get that MT done, they wanna
start this unit up and running so there really too many people who were
around so it didn't really have a chance to record the root inside
but the most important thing find your settings I'll keep your tungsten always sharp
and travel speed and the settings set up you know how much you can handle
and just keep going that's it pretty much I don't pause too much you know you wanna you wanna
side to side you want to spread that puddle on the both sides you know side to side motion
okay and this is the hot pass so the hot pass is done now when the hot pass is done I'm uh
they already did MT on the root so after hot pass now I'm gonna do one more pass to fill
as it's almost the end of the shift so I won't be able to finish all that Spool
in one shift so I'm gonna go 200, 200 amps for the fill pass same thing switch to the
cup 10.
and I've got to start from the bottom
Start from the Bottom going up finish one side and then I gotta finish the other side
a good habit here I'm gonna show you guys just the roll that roll your wrist
it's a good help especially if you get tired you know your hand and get fatigue or something
then you can roll you can easily switch your position and it's going to be easier for your body
works on the root too as well especially on heavy stuff you
know, after root, hot, and fill you're getting tired
your hand gets sore and uh it's good to switch good to change so you don't have to stop
as I said 200 amps same technique and that's it pretty much for the
fill the rest of the day shift will finish and it's going to be probably filled and cap with a stick