Welcome to weld.com.

I need to do a video
on oxyacetylene setup.

We wanna go through this for

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

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

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

I'm watching them, okay?

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

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

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

set this rig up for you.

Let's get to it.

First thing we wanna do is
inspect regulator fittings.

I already have the oxygen on here.

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

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

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

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

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

One thing to point out right now is,

this is female left-hand for the fuel gas.

The compressed gas association
has made it almost impossible.

I say almost.

You can't put this regulator on an oxygen.

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

Low pressure gauges.

High pressure gauges.

The fuel gas is left-hand thread, and

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

So I've inspected this.

I wanna thread this into the regulator.

I'm up over the top of this.

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

That part's done.

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

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

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

Again, left-hand thread, right-hand on

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

>> So I could see.

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

I've seen these actually in use for

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

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

snug them back up, okay?

So our hoses are correctly
attached to the torch body.

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

or the cutting attachment,
onto the torch body.

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

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

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

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

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

and then it won't seal up.

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

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

And I'll go ahead and just seat that.

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

the seats in this part of
the cutting attachment.

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

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

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

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

That was joyful at the moment.

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

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

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

Do not put a wrench on this.

There is no reason to
really crank this down.

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

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

they get a fire coming
out of these threads.

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

instead of taking this part and
finding out why,

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

So again, hand tight.

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

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

I'm comfortable with it.

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

it's supposed to stay there.

I know that it's just comfortable for me.

So I'm getting ready to cut.

Since I have the cutting
attachment on here,

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

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

That's my flame adjustment.

My cutting oxygen is on the lever.

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

configuring the torch attachment,
setting the tip,

I wanna turn these bottles on.

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

and they never check this.

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

I don't think that's cool.

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

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

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

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

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

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

just back them off where they're loose.

Turn these on slow.

Also stand to the side of them.

A full bottle of oxygen is high pressure.

2250 pounds thereabouts.

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

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

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

High pressure,
low pressure delivery, okay?

For general cutting,
depending on the size of torch,

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

Same thing on the low pressure fuel side.

Check this and make sure that it's loose.

Turn this on slow fuel gas.

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

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

Anywhere from five to eight, okay?

Our system is closed.

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

my acetylene, my fuel gas.

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

Before doing anything else,
I can check for leaks.

And I would simply do that.

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

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

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

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

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

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

I would check that I'd check this.

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

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

My needles are not moving.

I'm gonna turn this back on.

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

I didn't bleed the system either.

I'll turn that on full.

Turn this on one complete turn.

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

attachment off,
then I need to close this valve.

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

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

Let me grab my striker.

I'm gonna fire the system.

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

I light it.

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

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

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

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

Looks like I have a foul tip.

This is an OT tip.

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

depress the oxygen lever,
it actually gets shorter.

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

Want to turn the system off.

Turn the oxygen off.

Turn the acetylene off.

Now I need to shut this system down.

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

I don't think it matters.

We can argue.

We can fight.

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

Anyway, we can turn the fuel gas off.

First, we can turn the oxygen off.

Second, we're just turning
the cylinders off.

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

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

I wanna take the pressure
off of the regulators.

I wanna bleed the system.

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

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

till it becomes loose, close the fuel gas.

I can either push the oxygen lever, or

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

turn that off,
turn the pressure adjusting.

Screw to the left, roll my hoses up.

I'm good to go.

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

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

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

They are reverse-flow check valves and

flashback arresters.

And you can put them in line in

your hoses and to your torch.

Actually, go like that.

You got an older torch body.

Good idea to pick these rascals up here.

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

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

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

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

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

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

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

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

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

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

There are other videos
out on this references.

Hope you found this educational.

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Thanks for watching weld.com.

I'm Bob Moffatt.