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Date: Thu, 13 Sep 2001 19:45:45 -0400
To: lancair.list@olsusa.com
From: Marvin Kaye <marvkaye@olsusa.com>
Subject: Re: Compressors
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Posted for Jeff Dingbaum <aviators@wwa.com>:

 > gallon tank, by all means do so.  You can put the compressor on the outside
 > of the building, wire it into its own breaker, and plumb it into your shop
 > with PVC tubing... plain old schedule 40 PVC will easily hold back
 > 100-120psi, and installing runs with plastic is far easier than dealing
 > with black pipe or copper (and far less expensive).  They make plenty of

Please be careful running compressed air thru PVC pipe.  If you live in
colder states the PVC can become brittle and shatter.  I was on another
mail list some years ago and several builders shared comments that they
personally had seen PVC pipe sections explode under the pressure.  I can
not say that this is completely true or not, but I plan to run black pipe.
(since I do has some leftover from that gas grill "honey do" project.)

just thought it would be worth mentioning.

Jeff Dingbaum
express builder (taking some time off for ground school study)


[As I mentioned in a private post to Jeff, I've had some years of 
experience using good ol' sch40 PVC pipe in an industrial environment in 
the Chicago area and never missed a moment of production due to air line 
failure... and that was with 2 large screw compressors keeping the 2" 
distribution system pressured up to 135psi constantly.  The shop I was 
building in here in FL has had 3/4"PVC since the day it was built 
distributing about 130psi from a 2-stage compressor, and again, there have 
been no problems with it at all, not once in more than 6 years.  I imagine 
if you really freeze the stuff it might get brittle enough to blow, but 
let's face it, if the temps are that low in your shop it's likely you won't 
be working on composites anyway, so.......  The big deal is that working 
with PVC is so much easier for those of us who don't own pipe cutters and 
threaders, I just can't see a reason to use black pipe in a home shop, but 
hey, if you're more comfortable with it then by all means use it.

    <Marv>      ]

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