On Sun, 11 Jan 2004 16:30:01 GMT, Jim Wilson
wrote:



PVC weakens with time on exposure to UV radiation, also. Some good
sources for UV radiation are sunlight and fluorescent lighting. To make
it "safe" for compressed air, it would also need to be isolated from
shock and impact, and shrouded in something to prevent the shards from
going where they could do any damage to people or other things. It's
simply cheaper to use metal pipe than to make PVC safe.


Sounds to me that PVC is perfectly safe for compressed air usage
provided it is encased in a larger iron pipe :-)}
Gerry :-)}
London, Canada