O/A welding question: tip size

Morgans wrote:
"mhorowit" wrote in message
ups.com...

Morgans wrote:

too much oxygen
--
Jim in NC


Hello Jim - If I simply reduce the O2 at the handle, I'll get a
carburizing flame, right? I need a neutralized flame - MIke

This group has had many good descriptions of how to get the proper flame;
you might want to look it up. Yes, it should be neutral.

To give the short version, the inner flame should have a soft, feathered
edge, not a sharp, defined edge, and it should be a "quiet" flame.

If it makes soot, there is not enough O. If it burns the metal, (sparkles)
there is too much O.

You might need to move faster, take the flame further from the work, get the
filler metal in there faster, so it will get to the business of melting, or
even take the flame away for a second, every few seconds.
--
Jim in NC


Jim - I know how to make a neutral flame. I was just trying to figure
how reducing O2 would help since if that's all I did, the flame would
no longer be neutral. So I guess I need to follow your last para.
Thanks, Mike

"mhorowit" wrote in message
ups.com...
|
| Morgans wrote:
| "mhorowit" wrote in message
| ups.com...
|
| Morgans wrote:
|
| too much oxygen
| --
| Jim in NC
|
|
| Hello Jim - If I simply reduce the O2 at the handle, I'll get a
| carburizing flame, right? I need a neutralized flame - MIke
|
| This group has had many good descriptions of how to get the proper
flame;
| you might want to look it up. Yes, it should be neutral.
|
| To give the short version, the inner flame should have a soft,
feathered
| edge, not a sharp, defined edge, and it should be a "quiet" flame.
|
| If it makes soot, there is not enough O. If it burns the metal,
(sparkles)
| there is too much O.
|
| You might need to move faster, take the flame further from the work,
get the
| filler metal in there faster, so it will get to the business of
melting, or
| even take the flame away for a second, every few seconds.
| --
| Jim in NC
|
|
| Jim - I know how to make a neutral flame. I was just trying to figure
| how reducing O2 would help since if that's all I did, the flame would
| no longer be neutral. So I guess I need to follow your last para.
| Thanks, Mike
|

Just curious! Are you using the J-57 aircraft torch?

--
Jarhead




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Jarhead wrote:

Just curious! Are you using the J-57 aircraft torch?

--
Jarhead




Nope - an old lightweight Smith handle with MW 100 series tips.
I've discovered that the only standard description across tips is the
orifice opening, so that's why I'm not using tip names. - MIke

mhorowit wrote:

Jarhead wrote:

Just curious! Are you using the J-57 aircraft torch?

--
Jarhead





Nope - an old lightweight Smith handle with MW 100 series tips.
I've discovered that the only standard description across tips is the
orifice opening, so that's why I'm not using tip names. - MIke


Might I ask if there is a reason for holding 2 psi?

That seems a tad low...

"cavelamb" wrote

Might I ask if there is a reason for holding 2 psi?

That seems a tad low...

I was wondering the same thing. I usually go with around 32 Oxy, and 7
Acet. I am surprised he could get a neutral flame with those settings, but
he claims to know what a neutral flame is, and that he is getting it. I
wonder if his gauges are off...
--
Jim in NC

"Morgans" wrote in
:


"cavelamb" wrote

Might I ask if there is a reason for holding 2 psi?

That seems a tad low...

I was wondering the same thing. I usually go with around 32 Oxy, and
7 Acet. I am surprised he could get a neutral flame with those
settings, but he claims to know what a neutral flame is, and that he
is getting it. I wonder if his gauges are off...

32psi? That sounds more like "cutting tip" O2 pressure, not welding.

????

"Ken Moffett" wrote

32psi? That sounds more like "cutting tip" O2 pressure, not welding.

Yeah, you're right, it is. My mistake.

Ever try to weld with a cutting tip? Not easy, but it can be done! g I
wouldn't try to weld an airplane with a cutting torch, though.

Quite frankly, I do so little gas welding, I just play with it, until I like
it. I don't remember what I use. Does around 12 pounds sound about right?
That's what seems to come to mind.

Still, 2 pounds is not very much. I tend to use the knobs on the torch to
control the flow, as the most important control. I would think that if you
were using two pounds, you would have to have the knobs all of the way open.
I would think it would be hard to keep a consistent flame, like that.
--
Jim in NC

Ken Moffett wrote:

"Morgans" wrote in
:


"cavelamb" wrote


Might I ask if there is a reason for holding 2 psi?

That seems a tad low...

I was wondering the same thing. I usually go with around 32 Oxy, and
7 Acet. I am surprised he could get a neutral flame with those
settings, but he claims to know what a neutral flame is, and that he
is getting it. I wonder if his gauges are off...


32psi? That sounds more like "cutting tip" O2 pressure, not welding.

????


Weeeel, Jim, he likes a nice hot tip!

I run 7 and 14.
1 to 2?

or maybe it's 2 to 1?



Richard

32oxy and 7 acet??? thats more like cutting torch pressures. About 5psi
of each is more than enough. In fact, I used Kent "Tinman" Whites method
(I use a meco midget). you open the valves on the torch handle wide
open, then crack the acetylene regulator valve (not the tank valve,
thats already open) until you can feel the acetylne on your cheek, light
it, adjust it, then start turning in the oxygen regulator valve to get
your neutral flame.

Note: point the torch AWAY from your face before lighting!!

Done this way, the gauges on my regulators are pratically on the pins
with hardly any reading at all.

John

John T wrote:

32oxy and 7 acet??? thats more like cutting torch pressures. About 5psi
of each is more than enough. In fact, I used Kent "Tinman" Whites method
(I use a meco midget). you open the valves on the torch handle wide
open, then crack the acetylene regulator valve (not the tank valve,
thats already open) until you can feel the acetylne on your cheek, light
it, adjust it, then start turning in the oxygen regulator valve to get
your neutral flame.

Note: point the torch AWAY from your face before lighting!!

Done this way, the gauges on my regulators are pratically on the pins
with hardly any reading at all.

John

THanks, John.

I remember reading that.

Will give it a try next time.

Richard