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  1. #1
    Join Date
    Apr 2008
    Posts
    254

    Default flame vs rotary cut pipe bevel

    Why would one be preferred over the other? Rotary doesnt have a HAZ or require any (much?) cleanup but the equipment is very expense relative to flame bevelling. Im sure Im missing more important points.

  2. #2
    Join Date
    Apr 2008
    Posts
    254

    Default

    Any one???

  3. #3

    Default

    What material and grade of pipe?

    J
    Some days you eat the bear. And some days the bear eats you.

  4. #4
    Join Date
    Apr 2012
    Posts
    1

    Default

    Same question was asked when I was in school. Teach said that each has their place. On the back of a rig in a field, a torch beveler might be all you can run because you cannot get enough power off that bobcat to run a rotary.

    A rotary might be useful some where you cannot have a shower of sparks flying around, like a gas refinery. And why would HAZ be a worry, if your going to weld the pipe anyway, it would not matter.

  5. #5
    Join Date
    Apr 2008
    Posts
    254

    Default

    Quote Originally Posted by joeftw18 View Post
    Same question was asked when I was in school. Teach said that each has their place. On the back of a rig in a field, a torch beveler might be all you can run because you cannot get enough power off that bobcat to run a rotary.

    A rotary might be useful some where you cannot have a shower of sparks flying around, like a gas refinery. And why would HAZ be a worry, if your going to weld the pipe anyway, it would not matter.
    That a bunch of $ to tie up for the occasional use. Also seems a Bobcat should run one pretty easily.

    For high yield strength pipe and the like it seems there would be some cause for concern. Welding parameters are strict (as I understand it) and flaming cutting may not be acceptable in that it overheats the pipe + there would need to be some post heat procedure. So, in that case perhaps some other cutting method is necessary.

    ETA: It also occured to me that not all materials can be cut w/ flame. So, in that case perhaps the rotary machine might be used.
    Last edited by HayFarmer; 06-03-2013 at 05:45 AM.

  6. #6

    Default

    Regular oxy/acy beveling machine by a far, far, far wide margin on any carbon steel, of any grade. Using anything else is throwing dollars out the window.

    As already mentioned your haz is a result of the welding process and/or travel speed and current (those variables are addressed in the procedure), beveling the pipe is immaterial.

    There isn't any clean up on a proper cut bevel, just a few seconds to put on a land.



    J
    Some days you eat the bear. And some days the bear eats you.

  7. #7
    Join Date
    Apr 2008
    Posts
    254

    Default

    Quote Originally Posted by JTMcC View Post
    What material and grade of pipe?

    J
    No idea...any I suppose.

  8. #8
    Join Date
    Jun 2009
    Location
    las vegas
    Posts
    225

    Default

    Speed and consistency. Plus as previously mentioned not all materials can be torch cut.
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  9. #9

    Default

    Quote Originally Posted by strictlycarved View Post
    Speed and consistency. Plus as previously mentioned not all materials can be torch cut.


    A thermal beveling machine is a lot faster than any mechanical machine I've ever seen.

    Beveling machines will run with an oxy/acy torch or a plasma.

    J
    Some days you eat the bear. And some days the bear eats you.

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