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oxy acetylene psi? cutting and welding

Discussion in 'The Tool Shed' started by NJBLZ, Aug 15, 2006.

  1. NJBLZ

    NJBLZ 1/2 ton status

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    I read rustyparts post.

    looking for advice, what psi do you set your regulators at for cutting, I was told apporox 30 psi on the oxygen and 8 psi on the acetylene.


    also what psi for welding? I think I was told 4 psi on both.


    thanks
     
  2. sponsoredbydad

    sponsoredbydad Dune Slaying Sand Junkie Premium Member GMOTM Winner

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    I can only tell you what I was taught. cutting oxy-20-30 depending on thickness acetyelene 3 -5
    welding same on the acetyelene and 10 to 20 depending on the tip size and thickness of metal.
    some one on this site will be able to give you a professional answer.
     
  3. sled_dog

    sled_dog 1 ton status

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    I go more around 25 on oxy and 5-8 on acetylene.

    Flame setting is the most important thing in cutting. Of course psis come into play.
     
  4. tx_sub

    tx_sub 1/2 ton status

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    I have a quick reference book for oxy-fuel cutting/welding/heating. It gives general guidelines for PSI for different thickness metals and tip sizes. The aforementioned pressures sound about right. If you ask nicely, I can dig through the garage and pull out the book and give you those numbers. It is worth getting this book. Its yellow and from Victor. Shouldn't be more than a few dollars.
     
  5. thezentree

    thezentree 3/4 ton status

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    I usually run the oxygen about 40psi and the acetylene about 5-6psi.
     
  6. sled_dog

    sled_dog 1 ton status

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    something wrong with your torch? I never have to run anything near that much oxy unless there is something wrong.


    On another note, how do you guys setup a torch(flame that is)? I used to just guess, now I know what to look for and I cut SO much better now. See if I can come up with an example to show it.
     
  7. thezentree

    thezentree 3/4 ton status

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    That's just the way I was taught to set it up. It's worked for me, so I never thought to do it differently.

    Setup:

    Acetylene on, ignite, open acetylene until there's just barely a hint of smoke, open oxygen until there's a blue flame about 3 inches long, hold down cutting lever and tune oxygen until you get the six tiny flames at the tip of the torch and a jet of oxygen (I forget what it's called) about 4-6" long.
     
  8. NJBLZ

    NJBLZ 1/2 ton status

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    tx sub, thats ok i'll look for that book, i think welding shop where i got the setup sels victor stuff.

    as for flame setup, for cutting i'm ok, sombody shoed me what it should look like.

    i need to figure out the welding flame/tip now.
     
  9. OrangeCrushK10

    OrangeCrushK10 1/2 ton status

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    if you're welding only use 12-15 oxy psi and cutting at 25-30psi.

    acetlyne always at 5-8 psi welding or cutting.


    The welding flame - open acytl, light, open acytl until there's little smoke. Slowly open oxy until you have a blue flame with a bright blue center cone and no light blue/white cone.
     
  10. readymix

    readymix 3/4 ton status

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    NEVER set your ACY regulator above 15PSI


    NEVER, NEVER, NEVER, NEVER, NEVER, NEVER, NEVER, NEVER, NEVER, NEVER
     
  11. OrangeCrushK10

    OrangeCrushK10 1/2 ton status

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    ditto. It'll go boom.

    Also, never oil your regulators.

    It'll go boom.
     
  12. bowtiepower00

    bowtiepower00 1/2 ton status

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    Yeah it's good to avoid a "boom". I was taught 40/7, but for thinner automotive jobs, etc., less is OK. You'll get the feel of it. Most of my torch work is with 3/8" and thicker stuff, thinner stuff gets the plasma, unless I'm in the field.
     

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