[TheForge] PVC for compressed air

[Chuck Robinson]

I noticed no one has mentioned that the iron pipe helps cool the 
compressed  air and reduce the amount of moisture in the  air  when you 
use condensate drains in the piping.
Chuck


On 4/6/2011 10:59 AM, Paul Sperbeck wrote:
> Everyone has stated a number of very good reasons not to use PVC pipe
> for compressed GAS service of any type. I use the word gas in a boylean
> sense. If your shop is not used by anyone other than your self then the
> choice is yours, but you really should consider the safety or others...
>
> please see:
> http://www.usplastic.com/knowledgebase/article.aspx?contentkey=787
>
> The overriding consideration would be the insurance carrier that you
> have for your shop. Ask them.
> If they tell you it's covered for liability then do as you chose, but I
> seriously doubt that that would happen. If your agent says its OK, given
> the preponderance of manufactures that would not warranty the compressed
> gas service of their products, I would make sure that you get a
> statement of coverage from someone higher up the food chain.
>
> As a plumber with 42 years of experience I would be more likely to not
> make a big deal out of threading some pipe and installing drops and
> valves. If you install the system per manufactures recommendations the
> steel pipe will require fewer hangers and supports, does not take that
> much longer to install and will likely outlast your next of kin. I have
> nothing against plastic pipe, and in many situations it is superior to
> other materials... this is just not one of them.
>
> As I have said before, why would blacksmiths chose plastic over steel?
> Even though the steel pipe is three times as expensive as the plastic,
> you can find steel pipe in salvage yards... try that with plastic.
>
> Paul
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