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  1. #1
    Join Date
    May 2011
    Location
    Washington, DC
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    947

    Oxy/Acetylene setups

    For those of you who use Oxy/Acetylene setups for brazing, What do you set your pressures on and what size tips are you using for typical residential work? Lately, Ive been having trouble with my torches. I'm not sure if its related to the things I have asked or if I may have something in my tip (which came with the torch set). I'm looking for a new tip but rite now I use a #3 Harris tip and set my Acetylene on about 5 psi and oxygen at about 7 psi (both psi's are under draw. Any feedback is appreciated. Thanks.

  2. #2
    Join Date
    Oct 2011
    Location
    Arkansas
    Posts
    833
    Don't know about Harris tip sizes. I mostly use a #2 Turbo Torch oxy/acetylene tip. Handles anything up to 7/8" OD. I set mine where they read 3-5psig acet. 5-7psig oxy. I go more by the flame than I do the pressure setting.

  3. #3
    Join Date
    May 2011
    Location
    Washington, DC
    Posts
    947
    As do I but just wanted to see what some others use as their general setup. I think I may have got some brazing alloy in my tip. Torches are giving me the blues no matter how I try to adjust my flame. If I get it neutral it wants to snuff out or the acetylene wants to "jump" back onto the tip. I then have to close my oxygen, readjust my acetylene and then readjust my Oxy. But it does this rite as I get my joint heated up so I have to stop as I should be applying my braze. This made for a really difficult replacement of an out door TXV today.

  4. #4
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,635
    #3 is a rather large tip, those psi sure aren't helping your cause, especially if you have an MC & B tank.

    once tried using a #4 with my small tanks- jacked the psi up and couldn't keep tanks from emptying quick
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  5. #5
    Join Date
    May 2011
    Location
    Washington, DC
    Posts
    947
    Quote Originally Posted by dandyme View Post
    #3 is a rather large tip, those psi sure aren't helping your cause, especially if you have an MC & B tank.

    once tried using a #4 with my small tanks- jacked the psi up and couldn't keep tanks from emptying quick
    I use both in MC and that is the other problem, I empty my acetylene tank rapidly which I figured is because of my tip size. I'm going to look for a 1 or 2 tip.

  6. #6
    Join Date
    Aug 2008
    Location
    Eagle, Idaho
    Posts
    381
    I use standard #2.
    My pressures are at about 8psig and 12psig.
    Make sure you are heating up the coupler enough.
    Also keep in mind the weld is on the inside of the coupler, not the very end that the other pipe slips into. Wherever you point the flame is where the copper will go.
    just because there is a huge glop of solder on the end doesn't make it anymore sealed.
    Tell Obama he can keep the change

  7. #7
    Join Date
    Oct 2011
    Location
    Arkansas
    Posts
    833
    Quote Originally Posted by Ron223 View Post
    I use both in MC and that is the other problem, I empty my acetylene tank rapidly which I figured is because of my tip size. I'm going to look for a 1 or 2 tip.
    I'll go through 2 MC's to one R, or somewhere around that. Depends on how full the cylinders are from the gas supplier.

  8. #8
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,510
    I use a #2 from 3/8"-3/4", Rosebud for anything larger, #0 for cap tube-1/4" and coil/utube repair. I couldn't tell you the pressures as I adjust by the flame.
    If you think you have some debris in the tip, some 18 guage solid wire should be able to clear the tip for you.
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  9. #9
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    3,789
    i have a uniweld setup with a MCR 6000 and a #0 tip. both are set with gauge open 5-6psi act and 8-10psi oxy.

  10. #10
    Join Date
    Apr 2004
    Location
    MN
    Posts
    1,800
    I go with 7 (acetylene) and 11 (oxygen). 7-11 is easy to remember. #2 tip.
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  11. #11
    Join Date
    Nov 2011
    Location
    Erie, PA
    Posts
    129
    I go with the 7-11 and a #2 tip also.

  12. #12
    Join Date
    Jan 2011
    Location
    IOWA
    Posts
    11
    I set act at 5psi oxy at 10psi use #0 keep #2 for commercial your gas supplier has chart for sizing tip size for dia of pipe .

  13. #13
    Join Date
    Feb 2007
    Location
    Great Lakes Region
    Posts
    575
    7 and 10 is What is recommended for the uniweld #17 works great guzzles fuel. Most tip MFRS have recomended settings for thier tips

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