[TheForge] Foundations and shop design

[Paul N]

Dan,
Thanks for clarifying.

Yes, I believe OSHA allows PVC in above ground application for 
compressed air if encased in another medium capable of withstanding 
explosive failure.

I was only pointing it out as the discussion had moved toward not 
encasing it in concrete  to allow for drainage. As a safety issue, I 
thought it should at least be put on the table.

For those interested, here's an OSHA link: 
http://www.osha.gov/dts/hib/hib_data/hib19880520.html

**paul

dan tull wrote:
> Encased in concrete shouldn't be a shrapnel problem..
> ----- Original Message ----- From: "Paul" <crosspein at sbcglobal.net>
> To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
> Sent: Saturday, May 24, 2008 10:29 AM
> Subject: Re: [TheForge] Foundations and shop design
>>
>> I have heard for years that PVC eventually becomes brittle, and can 
>> fail in an explosive manner, sending PVC shrapnel around. I was able 
>> to find a lot of controversy, and ignored it for several years; but 
>> eventually decided to replace it with copper.
>>
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