O/A welding question: tip size

I'm having a welding problem. I'm using an OxyAcy rig. I'm
running 2 psi for each gas thru a .025 diameter tip. I find that in
order to weld join two pieces of .035 tubing with this tip, I must
adjust the flame until it's no larger than 3/16" long. Otherwise
I'm heating up too much of an area and burning away the outer sleeve
(in the case of a splice using an inner sleeve). A flame that small is
very difficult to adjust.

I'm puzzled because the charts I'm looking at show a tip of this
size is appropriate for this size work.

Can you suggest what might be my problem? - Regards, Mike

"mhorowit" wrote in message
ups.com...
I'm having a welding problem. I'm using an OxyAcy rig. I'm
running 2 psi for each gas thru a .025 diameter tip. I find that in
order to weld join two pieces of .035 tubing with this tip, I must
adjust the flame until it's no larger than 3/16" long. Otherwise
I'm heating up too much of an area and burning away the outer sleeve
(in the case of a splice using an inner sleeve). A flame that small is
very difficult to adjust.

I'm puzzled because the charts I'm looking at show a tip of this
size is appropriate for this size work.

Can you suggest what might be my problem? - Regards, Mike

too much oxygen
--
Jim in NC

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

"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

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

"mhorowit" wrote in message
ups.com...
I'm having a welding problem. I'm using an OxyAcy rig. I'm
running 2 psi for each gas thru a .025 diameter tip. I find that in
order to weld join two pieces of .035 tubing with this tip, I must
adjust the flame until it's no larger than 3/16" long. Otherwise
I'm heating up too much of an area and burning away the outer sleeve
(in the case of a splice using an inner sleeve). A flame that small is
very difficult to adjust.

I'm puzzled because the charts I'm looking at show a tip of this
size is appropriate for this size work.

Can you suggest what might be my problem? - Regards, Mike


Heat needs to be mostly directed towards the inner sleeve and away from the
easy to burn exposed edge. Using a larger diameter welding rod to shield the
exposed edge can help. But it sounds like, in spite of what your chart says,
you need to use a smaller tip. Just be sure you are getting enough of a
puddle on the sleeve as you turn down the heat.

--
Geoff
The Sea Hawk at Wow Way d0t Com
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