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  1. #1
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    Nov 2014
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    Insulating ref piping

    For some weird reason I enjoy insulating haha. Nothing special but I really appreciate how much better mitered fittings work rather than just sliding it over, where it can pinch and ice up on freezer suction lines. I didnt do the liquid line, I was just fixing the suction.




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  2. #2
    Join Date
    Apr 2003
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    Maple Grove, MN
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    That is a thing of beauty! That is definitely the right way to do it, but few people have the patience (or a sharp enough knife) to accomplish anything close to being that nice.

    If I were to try something like that I would probably end up with glue all over myself and it would end up looking like an abortion.

  3. Likes Rustytool liked this post
  4. #3
    Join Date
    Oct 2005
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    B.C. Canada
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    What kind of knife do you use? It blows my mind how quickly cutting armaflex dulls standard razor knife blades..


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  6. #4
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    Thread Starter


    I use a “kerf saw” with very fine teeth. At first it didn’t seem like the best tool for the job, but after trying various smooth blade knifes unsuccessfully, I gravitated back towards the saw.


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  7. #5
    Join Date
    Oct 2011
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    Chicagoland Area
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    Very nice. You'd of gone thru 2 packages of razor blades to make all those cuts
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

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    Liberalism-Ideas so good they mandate them

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  9. #6
    Join Date
    Oct 2011
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    Gladstone, Oregon (Portland)
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    Just split it and use a good lineset tape and tape it completely.

  10. #7
    Join Date
    Apr 2003
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    Maple Grove, MN
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    Quote Originally Posted by Adlerberts-Protege View Post
    Just split it and use a good lineset tape and tape it completely.
    What's lineset tape? OK, I just looked it up. I've been looking for something like this for several years, I never knew it existed. I have been using black duct tape, but that stuff sucks. I'm going to get me some real lineset tape now. Thanks AP.

    Note... I'm not saying this lineset tape could in any way be a replacement for the method that GoCougs uses, but I can see where the tape could have it's place.



    If at First You Don't Succeed, Skydiving Is Not for You.

  11. #8
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    Dec 2009
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    maroon lazyboy
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    Quote Originally Posted by Adlerberts-Protege View Post
    Just split it and use a good lineset tape and tape it completely.
    On freezer suction lines, it is not good to have much tape on the outside of the insulation, the insulation can’t breathe properly and can become waterlogged and drip during defrost.

  12. #9
    Join Date
    Oct 2005
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    B.C. Canada
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    How does closed cell insulation “breath”?


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  13. #10
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    Dec 2009
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    maroon lazyboy
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    Quote Originally Posted by coolerik View Post
    How does closed cell insulation “breath”?


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    Good question. It’s what I was taught, and frost is an issue on lines with too much tape. But there is a strong possibility that I am wrong as well!

  14. #11
    Join Date
    Oct 2005
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    I doubt it’s about breathing, mabey the tape is on to tight squishing the insulation and ruining its R value.. or just not thick enough?


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  15. #12
    Join Date
    Nov 2014
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    Northern Idaho
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    Thread Starter

    Insulating ref piping

    Quote Originally Posted by Adlerberts-Protege View Post
    Just split it and use a good lineset tape and tape it completely.
    Thats a big emotional negatory for me

    The stuff I tore off had a combination or poor glueing techniques and black duct tape over that. Once water gets between the insulation and the pipe its going downhill from there. The armaflex manual says that if you want you can put a wrap of tape around the joints after theyve been properly glued. Theres no way taping it will make the airtight seal you need.

    Armacell even recommends glueing the insulation to the pipe at intervals, so that if a section gets infiltrated it doesn’t ruin everything.

    Tape might be a great solution for resi AC but no way in commercial refrigeration.


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  17. #13
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    Jul 2012
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    WA
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    That is some seriously impressive insulation work!

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