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  1. #1
    Join Date
    Jan 2010
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    1

    Default Building and outdoor wood boiler

    I just finished welding the water jacket for the boiler. I had no major leaks but many pinhole leaks and i was wondering if anyone had any idea's on what i could put on the welds or in the water to stop the pinhole leaks. Thanks.

  2. #2
    Join Date
    Jul 2006
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    1,508

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    Caution!
    These are "my" views based only on “my” experiences in “my” little bitty world.

  3. #3
    Join Date
    May 2009
    Location
    The Colorado Gas Patch
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    185

    Default

    Steve

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    And a forklift to move the heavy stuff with..

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  4. #4
    Join Date
    Aug 2004
    Location
    Milan Michigan
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    1,721

    Default

    You might want to consider V- grooving the welds out and having a professional weld it.

    You might also want to consider an unpressurized boiler if your not a pro.

    Pressurized boilers can kill if you dont do things right.

    I know a guy that had a portion of his blow up so he now runs it without pressure.

    Good luck.

  5. #5
    Join Date
    Oct 2007
    Location
    Edmonton,Alberta.
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    632

    Default

    Quote Originally Posted by Pass-N-Gas View Post
    hubbabubba will just make larger bubbles, can't speak for it's holding power.

  6. #6
    Join Date
    Feb 2008
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    889

    Default

    Quote Originally Posted by johnosu1 View Post
    I just finished welding the water jacket for the boiler. I had no major leaks but many pinhole leaks and i was wondering if anyone had any idea's on what i could put on the welds or in the water to stop the pinhole leaks. Thanks.
    The pinholes are called "porosity" and it means it was not welded properly.

    It needs to be ground out or cut out with a torch, properly prepared, and re-welded.

    80% of failures are from 20% of causes
    Never compromise your principles today in the name of furthering them in the future.
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  7. #7
    Join Date
    Jan 2010
    Location
    Perth County
    Posts
    4

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    Quote Originally Posted by Bodybagger View Post
    The pinholes are called "porosity" and it means it was not welded properly.

    It needs to be ground out or cut out with a torch, properly prepared, and re-welded.
    I agree 110% with Bodybagger. They should be ground out and re-welded. Putting something in the water is not the 'right' way to fix it.

  8. #8
    Join Date
    May 2007
    Location
    Alberta
    Posts
    135

    Default

    Its a very good thing that u have the brains and the ***** to tackle a project such as a boiler. Based on whatever design you have created though, you have the potential for a very serious explosion and knowing the limits of your skill could save your life and or property. Have u installed any kind of pressure relief or is there any built in redundancy in your design. For your own safety and piece of mind, groove out and reweld or have it professionally welded.
    owner of EVOLUTION WELDING

  9. #9
    Join Date
    May 2009
    Location
    The Colorado Gas Patch
    Posts
    185

    Default

    Quote Originally Posted by Cornerstone View Post
    hubbabubba will just make larger bubbles, can't speak for it's holding power.
    These bubbles are actually a Safety-Micro-Containment-Device..

    Once all of the water from the boiler filled the S-M-C-D's there would be no more leaks or any chances of the boiler blowing up when the heat is applied to the system...
    Last edited by Pass-N-Gas; 01-30-2010 at 10:08 PM.
    Steve

    Bobcat 250EFI

    Syncrowave 250

    Millermatic 350P

    Hypertherm 1250

    A Bunch of tools

    And a forklift to move the heavy stuff with..

    Looking at CNC Plasmas

    It's Miller Time - Get Back To Work!

  10. #10
    Join Date
    Feb 2008
    Location
    West Bloomfield, Michigan
    Posts
    44

    Default Loctite 290 (green wicking grade)

    You can coat the inside and outside of the weld with loctite 290 as it will wick into the porosity - penetrate deep - and seal it up both air and water tight; but I would only suggest this in a maintenance capacity as a quick temporary fix on something un-pressurized. It will take boiling water temps no-problem but you throw pressure into the mix and it will blow out the weakest link.

    You could drain it and dry out the welds by heating them up a little with a rosebud torch, then squirt on the loctite 290 and it will wick right in and seal up. Although, considering you are building something new, you should re-do it right.
    Last edited by t1113rs; 01-31-2010 at 03:11 PM.
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