Rutland black cement cracking

Malak Posted By Malak, Aug 23, 2008 at 12:52 PM

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  1. Malak

    Malak
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    Jul 30, 2008
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    Has anyone else had issues with Rutland black
    cement cracking and breaking off of black
    stovepipe? Do you think I need to rough up
    the surface maybe? Also, they mention wetting
    the surface with water and I did not do that.
    Could be a bad batch obviously also.

    thanks
     
  2. DiggerJim

    DiggerJim
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    Jul 29, 2008
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    Let's see, you didn't follow the directions, it didn't work out, but it's potentially a bad batch? Odds are it's user error not a product problem. Strip it off, clean up the pipe and try again following the directions, let it cure slowly (too high a heat too fast will cause cracking too) and then see how it works.
     
  3. kinsmanstoves

    kinsmanstoves
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    Aug 29, 2007
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    Hi temp silicone is a much better option on P and/or L vent pipe.

    Eric
     

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  4. Malak

    Malak
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    Jul 30, 2008
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    Yeah, I'm not big on red silicone on black pipe. Isn't there
    a high temp engine RTV that may work or is that only good
    for 400 degrees?

    Glad to hear that it's not just that I didn't totally follow the
    directions. :p How many people even READ them? Give
    some credit.
     
  5. kinsmanstoves

    kinsmanstoves
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    There is a black ("noir" for you north of the border folks) but it is rated at 450 degrees.
     

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  6. Malak

    Malak
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    Um... yes... click the picture in post number #3.

    600 F right on the tube.
     
  7. R&D Guy

    R&D Guy
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    Apr 25, 2007
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    That's likely not the continuous rating, it's probably only "heat resistant" up to 600°. Meaning that it cannot take more than a few brief periods at 600°. Can someone read the back and state the true (continuous) temp limit?
     
  8. kinsmanstoves

    kinsmanstoves
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    Nothing on continuous but flexible from -85 f to 600f

    Eric
     
  9. Malak

    Malak
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    Jul 30, 2008
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    I work in engineering among many other things, and yes it's true that they milk the max ratings, but the true continuous ratings are often only 50 degrees off of that number. I'm disappointed with the lack of imagination of many people on this site. Everyday, things are discovered which break all the previous rules of materials. Nearly nothing is impossible if you have an open mind.

    Ok, maybe it IS impossible to get all green lights when you are late for work. LOL
     
  10. DiggerJim

    DiggerJim
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    Not impossible - just illegal (federal crime now) if you do it yourself unless you're an emergency personnel user of something called MIRT. It's a box that sits on your dash or hooks to your visor and can override the traffic signals to green for you. The signals have to be IR capable (depending on where you live that's probably between 1/3 to nearly all). You also need to buy a MIRT box (http://www.skyoptics.com/Mirt.htm) or build one yourself http://www.i-hacked.com/content/view/176/44/

    As you pointed out...nearly anything is possible :)
     
  11. Malak

    Malak
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    Yes, I actually knew about that, and forgot, but thanks for proving my point.
    We never would have reached the moon with an attitude of things being
    impossible or unlikely.
     
  12. R&D Guy

    R&D Guy
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    Apr 25, 2007
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    Ahh good another engineer. :coolgrin: Well if you are really for breaking previous rules then red silicone it is.
     
  13. Xena

    Xena
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    Nov 30, 2005
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    I don't think you're going to find many people in
    the pellet mill section who have used the Rutland cement
    on their pellet stove piping because it's just not necessary
    if, you use the correct pellet vent pipe for your application.
    Most of the time a thin bead of hi temp silicone on some
    of the joints is all that is needed for these setups.
     
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