[TheForge] PVC for compressed air (A little OT -- a mini-scalesaber saw?)

[Larry Ruebush]

In some further checking, I believe it is HDPE plastic piping that is ok to 
use with compressed air.
Larry Ruebush
----- Original Message ----- 
From: "Larry Ruebush" <lrt at winco.net>
To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Tuesday, April 05, 2011 8:09 AM
Subject: Re: [TheForge] PVC for compressed air (A little OT -- a 
mini-scalesaber saw?)


> There is a type of PVC pipe that is made for use with compressed air. I
> forget what it is called, but I believe it is green colored. A couple of
> years ago, the local Pioneer Seed Plant did some remodeling and used it.
> Pioneer is a division of DuPont  and is a very safety nut. I am sure if it
> wasn't very safe to use, they won't. I asked them about it when they
> installed it and was told that  that type was safe.
> Larry Ruebush
> west central IL
> ----- Original Message ----- 
> From: "Paul N" <crosspein at sbcglobal.net>
> To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
> Sent: Tuesday, April 05, 2011 7:33 AM
> Subject: Re: [TheForge] PVC for compressed air (A little OT -- a 
> mini-scale
> saber saw?)
>
>
>> I'd be cautious about using PVC for compressed air. For years, there
>> have been debates about the danger, and I pretty much disregarded them.
>> Then about 10 years ago, I gave in and decided to replace it with type
>> "L" copper. Type L is what is recommended for compressed air. Many of
>> the big box stores carry it, in addition to the cheaper Type "M", which
>> is what is used for the most common plumbing.
>>
>> The danger of PVC is similar to what is currently in the news for the
>> Boeing 737's. The constant flexing from the pressurization and
>> depressurization work hardens it over timee and makes it brittle. Then
>> it cracks and fails catastrophically, often sending plastic shrapnel in
>> all directions.
>>
>
>
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