Range of a given OxyAce tip

[Michael Horowitz]

We know general instructions for chosing a tip, setting pressures,
lighting the torch and setting the Acetylene so that the flame is just
about to leave the tip. Then we add O2 until we get a flame with just
a little feather. Written instruction seems to stop there.

However, we know one can adjust the torch for a larger or smaller
neutral flame, so each tip has a range of useful flame sizes.
At the low end the torch makes no noise; one opens the torch and you
go thru a hissing sound, to the roar of a jet engine.

No one seems to discuss how to determine the upper end of this range.

Can someone discuss how to determine the upper range of a given tip
size? - Mike

[Maxwell[_2_]]

"Michael Horowitz" > wrote in message
...
> We know general instructions for chosing a tip, setting pressures,
> lighting the torch and setting the Acetylene so that the flame is just
> about to leave the tip. Then we add O2 until we get a flame with just
> a little feather. Written instruction seems to stop there.
>
> However, we know one can adjust the torch for a larger or smaller
> neutral flame, so each tip has a range of useful flame sizes.
> At the low end the torch makes no noise; one opens the torch and you
> go thru a hissing sound, to the roar of a jet engine.
>
> No one seems to discuss how to determine the upper end of this range.
>
> Can someone discuss how to determine the upper range of a given tip
> size? - Mike
>

One consideration is gas velocity.

Operating tips in their upper range can help disperse the weld, and
especially brazing puddle. Sometimes this is desired, sometimes it's not.

[Brian Whatcott]

Maxwell wrote:
> "Michael Horowitz" > wrote in message
> ...
>> We know general instructions for chosing a tip, setting pressures,
>> lighting the torch and setting the Acetylene so that the flame is just
>> about to leave the tip. Then we add O2 until we get a flame with just
>> a little feather. Written instruction seems to stop there.
>>
>> However, we know one can adjust the torch for a larger or smaller
>> neutral flame, so each tip has a range of useful flame sizes.
>> At the low end the torch makes no noise; one opens the torch and you
>> go thru a hissing sound, to the roar of a jet engine.
>>
>> No one seems to discuss how to determine the upper end of this range.
>>
>> Can someone discuss how to determine the upper range of a given tip
>> size? - Mike
>>
>
> One consideration is gas velocity.
>
> Operating tips in their upper range can help disperse the weld, and
> especially brazing puddle. Sometimes this is desired, sometimes it's not.
>
>
Yep, that's the way I see it too.
If you want more heat you turn up the gases. When the tip exit speed is
greater than the flame speed, you're done.

Brian W

[Bob Murray]

"Brian Whatcott" > wrote in message
...>>
> Yep, that's the way I see it too.
> If you want more heat you turn up the gases. When the tip exit speed is
> greater than the flame speed, you're done.
>
> Brian W
Kent White www.tinmantech.com has an excellent essay on setting up torches;
start at max and adjust from there.
Bob