Memmeddu
Member
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- Italia Sardegna
Hi everyone, hope you are all doing well.
So the title is the question.
I can't really understand why there's this use to set pressure so high on oxy propane torches .
We use 6290NX cutting tips on our cutting torches at work .
But something I've noticed are that while swapping between a tip to another it's possible to see numbers
For example today I've installed a #2 tip and it says 15 to 25mm ,2.0 3.0 bar.
Gave a look to the gauges and believed it was propane pressure so it should have been right...
Oxygen pressure set at around 10 bar .
Since the first day at work I've thought that was way too much pressure.
But you know ,I'm new there, colleagues are much more expert than me and boss has set the pressures ,and if I try to lower them down he will most likely get upset and set them up again.
Anyway in those days working on a bucket I had to install a much bigger tip (heavy preheat and 100mm cutting capacity) .
Results are poor cutting quality , frozen oxygen regulator , lot of dross, upper side of cut melted, etc .
I've made a research and #2 tip needs 0.8 bar propane and 3.0 bar oxygen if used on a non injection torch (which is what we have) .
So why so much pressure?
Why they think to know better than what the manufacturer (Harris) recommend for the tip , designed and produced by them ?
I'm literally melting metal prior to be able to cut opening the oxygen , and rewelding it while cutting, because preheat flame it's too hot and can't be adjusted .
So the title is the question.
I can't really understand why there's this use to set pressure so high on oxy propane torches .
We use 6290NX cutting tips on our cutting torches at work .
But something I've noticed are that while swapping between a tip to another it's possible to see numbers
For example today I've installed a #2 tip and it says 15 to 25mm ,2.0 3.0 bar.
Gave a look to the gauges and believed it was propane pressure so it should have been right...
Oxygen pressure set at around 10 bar .
Since the first day at work I've thought that was way too much pressure.
But you know ,I'm new there, colleagues are much more expert than me and boss has set the pressures ,and if I try to lower them down he will most likely get upset and set them up again.
Anyway in those days working on a bucket I had to install a much bigger tip (heavy preheat and 100mm cutting capacity) .
Results are poor cutting quality , frozen oxygen regulator , lot of dross, upper side of cut melted, etc .
I've made a research and #2 tip needs 0.8 bar propane and 3.0 bar oxygen if used on a non injection torch (which is what we have) .
So why so much pressure?
Why they think to know better than what the manufacturer (Harris) recommend for the tip , designed and produced by them ?
I'm literally melting metal prior to be able to cut opening the oxygen , and rewelding it while cutting, because preheat flame it's too hot and can't be adjusted .