Outdoor pipe insulation [RE-wrenches]

[Tom Lane, Energy Conservation Services]

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your information is incorrect  - Armaflex can easily take temperatures of 
over 240f  it does need to be protected from UV light and 20 feet use on 18 
feet of pipe - however you are incorrect on the temperature rating --the 
product has been use in the HVAC industry for years   --fiberglass soaks up 
water and is only R-3 per inch compared toR-3.5 for elastomerics    gator 
tom
----- Original Message ----- 
From: "Kurt Nelson" <sunwise at cheqnet.net>
To: <RE-wrenches at topica.com>
Sent: Monday, October 25, 2004 3:49 PM
Subject: RE: Outdoor pipe insulation [RE-wrenches]




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I've had bad luck with Armaflex.  It not only photo degrades, it also
does not hold up well to temps nearing 200'F.  Tight elbows and
compressed areas (where taped) start to shrink/melt as low as 180', even
though I think it is rated to something like 208.

My last job I used standard fiberglass (one inch wall) with the PVC
jacketing and pre-formed elbows and such.  Don't use the tape for the
jackets, rather small wipes of PVC cement.  Pricey, but rated to
something like 1,200'.

Kurt Nelson

-----Original Message-----
From: Ken Schaal [mailto:ken at commonwealthsolar.com]
Sent: Sunday, October 24, 2004 12:41 PM
To: RE-wrenches at topica.com
Subject: Re: Outdoor pipe insulation [RE-wrenches]




For really effective UV protection for Armaflex and Rubatex  ,
I use fibered duct mastic, which can be tinted with latex paint
.Virtually
permanent.!  Be sure to compress the insulation some as it shrinks [
shortens ] with time and temperature, thus causing gaps at the joints.
Be sure not to use the polyethylene insulations for exterior or any pipe
that might see 212+, as it will melt.

Ken Schaal






Brad,
Armaflex and Rubatex are the long-time standards, usually available
through
plumbing suppliers or Smitty. Paint it with exterior latex paint for
protection against UV degradation.
Allan at Positive Energy

----- Original Message ----- 
From: "Brad Bassett" <bsbassett at earthlink.net>


Hi,

I'm looking for some high quality, easy to install pipe insulation for
outddoor use on solar thermal panels. What is there? Where to get it?

Brad Bassett
AEE

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