WEBVTT

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Welcome to weld.com.

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I need to do a video
on oxyacetylene setup.

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We wanna go through this for

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safe operations setup everything about
the torch, the hoses, the regulator.

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I don't take for granted that people know
this when they come in to my shop for

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the first time, or I'm working
around them for the first time.

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I'm watching them, okay?

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I'm not saying that I do it absolutely
perfect, but I've been doing it for

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such a long time I've never had a problem.

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A couple of things you wanna do, follow
some rules anyway I wanna go through and

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set this rig up for you.

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Let's get to it.

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First thing we wanna do is
inspect regulator fittings.

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I already have the oxygen on here.

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But I wanna point out that any time
that you're getting ready to set

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the regulators on the tanks for
the first time, look at the seats, okay?

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Inspect these seats,
make sure they're not dinged.

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If you drop one of these,
it's got a dent in it.

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It's gonna make it a little harder for
it to seat up.

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One thing to point out right now is,

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this is female left-hand for the fuel gas.

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The compressed gas association
has made it almost impossible.

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I say almost.

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You can't put this regulator on an oxygen.

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You can't put the oxygen on
the acetylene for a very good reason.

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Low pressure gauges.

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High pressure gauges.

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The fuel gas is left-hand thread, and

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it's indicated by a cut in
the outside of the nut here, okay?

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So I've inspected this.

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I wanna thread this into the regulator.

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I'm up over the top of this.

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I'm turning it to the left to tighten it.

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That part's done.

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I don't have a torch on my hoses, so I'd
like to move off to the to the hoses and

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put them onto the torch body,
not turning these on yet.

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Next thing I need to do is attach
the hoses to the torch body.

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Again, left-hand thread, right-hand on

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the oxygen it's indicated by O and
F for fuel gas.

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>> So I could see.

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>> It's a good idea to
occasionally check fittings.

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I've seen these actually in use for

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quite a while, and
they get loose and back off.

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Do a leak check with soapy water,
go by with the wrench and

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snug them back up, okay?

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So our hoses are correctly
attached to the torch body.

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The next thing I wanna move on to
is attaching the cutting head,

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or the cutting attachment,
onto the torch body.

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I'm gonna go ahead and put a tip in this.

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And again,
[COUGH] I wanna inspect the seats on this.

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There's two machine seats in here,
one of them here and one of them here.

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And if this has a dent, or
if this has been dropped,

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this is soft enough material that
it'll put a ding in this seat,

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and then it won't seal up.

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I like to put these on, give them
about a half twist or a quarter twist.

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This is the only nut that
you wanna put a wrench on.

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And I'll go ahead and just seat that.

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The next thing I wanna do
is inspect the O rings and

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the seats in this part of
the cutting attachment.

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These are easily replaceable, but
if they're dry rotted or I've been using

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a torch before and for thing was blowing
out in the threads right here, and

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I wondered why, and
I stopped and shut it all down.

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I unthreaded this, and
it didn't even have an O ring in there.

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That was joyful at the moment.

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So the way I like to put these together,
always hang on to this, and

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I like to start the threads, and get it
down there where it's about to touch.

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I like to give it about a half twist and
hand tighten this.

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Do not put a wrench on this.

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There is no reason to
really crank this down.

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And I've seen people do this and
it just sends chills down my spine.

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They'll be operating their torch, and
they'll get a little blow by, and

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they get a fire coming
out of these threads.

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And the first thing they do is
come over here and tighten it,

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instead of taking this part and
finding out why,

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they just go ahead and over tighten it,
not I just disagree with that.

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So again, hand tight.

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I personally like to have my
valves away from my cutting lever.

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It's just the way I've been
operating it for years.

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I'm comfortable with it.

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I know that if [COUGH] I sling
this hose over my shoulder,

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it's supposed to stay there.

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I know that it's just comfortable for me.

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So I'm getting ready to cut.

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Since I have the cutting
attachment on here,

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I wanna open this oxygen valve
all the way and leave it open.

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My flame is now adjusted between
the fuel gas here and the oxygen here.

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That's my flame adjustment.

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My cutting oxygen is on the lever.

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Okay, we've gone through
[COUGH] setting the hoses up,

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configuring the torch attachment,
setting the tip,

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I wanna turn these bottles on.

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I see people shut their rigs down, or
they walk up to cylinders to turn on,

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and they never check this.

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They leave them in the same place all
the time where there's pressure on them.

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I don't think that's cool.

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I had a very good friend of
mine that repaired torches, and

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regulators, and
he told me stories about things that he's

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repaired that would just absolutely
blew up and it wasn't cool.

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Back these off just so they're loose,
they don't have a pressure on them.

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And when I say back them off, that's
not to the right, that's to the left.

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You don't wanna back them off
where the screw falls off, but

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just back them off where they're loose.

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Turn these on slow.

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Also stand to the side of them.

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A full bottle of oxygen is high pressure.

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2250 pounds thereabouts.

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Turn this on full, but
you don't want this pressure adjusting

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screw tightened and then come over
here and crank this baby open.

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It's shocking that diaphragm on
the backside of the delivery regulator.

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High pressure,
low pressure delivery, okay?

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For general cutting,
depending on the size of torch,

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you can run your oxygen pressure up to 25,
some people run it up as high as 70.

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Same thing on the low pressure fuel side.

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Check this and make sure that it's loose.

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Turn this on slow fuel gas.

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We turn on one complete turn,
depending on the size of the tip,

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we'll run the pressures
up to the 678 pounds,

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Anywhere from five to eight, okay?

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Our system is closed.

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I have this closed, and
I have the fuel gas closed, my oxygen,

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my acetylene, my fuel gas.

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This is what I would adjust
the flame with right now.

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Before doing anything else,
I can check for leaks.

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And I would simply do that.

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Since this is pressured up, my valves are
closed, I can turn these cylinders off.

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And if either of the needles move anywhere
in this system, I have a leak, okay?

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I might be able to find a fuel
leak because the settling stinks.

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I'm not gonna find it on the oxygen side.

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So I would stop at that point and
go get some soapy water, and

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I would check that connection,
there's a splice in the hose somewhere.

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I would check that I'd check this.

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If I've got a leak somewhere,
it would show up with the soapy water,

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but that is a fast, ineffective,
accurate way to check for leaks.

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My needles are not moving.

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I'm gonna turn this back on.

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Yes, I realize I didn't back that off.

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I didn't bleed the system either.

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I'll turn that on full.

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Turn this on one complete turn.

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If I need to do anything
[COUGH] to take the cutting

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attachment off,
then I need to close this valve.

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And then I could turn this
any which way I want.

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So I think we're at a point
where we can test fire.

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Let me grab my striker.

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I'm gonna fire the system.

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I've turn the settling on slowly,
about a half turn.

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I light it.

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I wanna light it until I
don't have a bunch of soot.

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I do not wanna turn it on so that
the flame separates from the tip either.

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Connect that back and get a good burn
out here where it's not blowing to it,

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slowly turn some oxygen on
until I get a neutral flame.

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Looks like I have a foul tip.

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This is an OT tip.

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An OT tip, nice and clean,
should get a good burn in it as I

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depress the oxygen lever,
it actually gets shorter.

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To me, that indicates turbulence in that
tip needs to be cleaned out a little bit.

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Want to turn the system off.

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Turn the oxygen off.

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Turn the acetylene off.

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Now I need to shut this system down.

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And in order to do that, I've never known
which one of these turns off first.

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I don't think it matters.

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We can argue.

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We can fight.

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If somebody knows absolute fact and
can back it up, tell me.

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Anyway, we can turn the fuel gas off.

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First, we can turn the oxygen off.

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Second, we're just turning
the cylinders off.

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We're gonna secure the system like we're
gonna leave overnight or for a week.

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At this point,
I wanna bleed the system, okay?

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I wanna take the pressure
off of the regulators.

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I wanna bleed the system.

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So I'm gonna bleed the fuel gas first,
both needles drop.

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At that point,
I back the adjusting screw to the left

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till it becomes loose, close the fuel gas.

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I can either push the oxygen lever, or

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I can open the flame,
adjusting oxygen bleed the system,

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turn that off,
turn the pressure adjusting.

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Screw to the left, roll my hoses up.

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I'm good to go.

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One other thing that I noticed
when I was putting this together,

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and I failed to mention, this torch has
built in flashback arrestors in it.

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Older models don't but you can get
these cute little guys right here.

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They are reverse-flow check valves and

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flashback arresters.

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And you can put them in line in

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your hoses and to your torch.

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Actually, go like that.

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You got an older torch body.

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Good idea to pick these rascals up here.

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Again, I don't take any of this for
granted.

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This is like you're working with
high pressure oxygen and fuel gas.

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There's just certain safety
procedures that you go through.

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I don't take for granted that everybody
that comes in, even though they've been

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a welder for 1015, 2030 years, I don't
take for granted that they know this.

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I've seen people develop some bad
habits on doing certain things,

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turning cylinders on with the regulator,
the way they light up hot starts.

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I've seen them cut corners, and
it kinda makes me a little nervous.

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[COUGH] If they work safe, accurate,
they pay attention to their work area.

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I don't have a problem, but
again, don't take it for granted.

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There are other videos
out on this references.

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Hope you found this educational.

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Please subscribe to our channel.

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Thanks for watching weld.com.

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I'm Bob Moffatt.