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Shops setup for air!!!!!
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<blockquote data-quote="Comet" data-source="post: 768272" data-attributes="member: 15944"><p>Do a google search for shop air systems using PVC and I'm sure you will find lots of horror stories and near deaths. Hot Rod magazine had to do a major retraction on a story they ran on building a shop air system with PVC due to all the problems. Plastic does not age well and with 100 or more psi running through the lines, even a scratch with a screw driver with the system under pressure can cause the lines to shatter. If you can't afford copper, run black pipe. Or, do what I'm doing and piece meal it as you go to save on the big cost bite all at once.</p><p>Another benefit to using copper is that the fittings work much better with them than PVC. PVC threads get easily stressed and are not built to take the constant working that air systems have. Pulling a hose and bending the coupler fitting just a little can stress the PVC connection and cause leaks. Even initial connections take some learning to get them just right so they don't leak, and you don't over tighten them.</p><p>I have heard that PVC is against the law in OSHA eyes. But I've also heard OSHA does not recommend using PVC over 30psi, which IMO makes it pointless anyway. You might get away with 50-60 psi, but over that is just playing Russian Roulette, over and over. Eventually you'll find the right chamber with the bullet. Once the PVC becomes brittle, it can cause shrapnel type projectiles in high pressure failures. Cases have been documented of shrapnel penetrating drywall 30' away</p><p>Finally, PVC manufacturers do not recommend their product for compressed gasses.</p></blockquote><p></p>
[QUOTE="Comet, post: 768272, member: 15944"] Do a google search for shop air systems using PVC and I'm sure you will find lots of horror stories and near deaths. Hot Rod magazine had to do a major retraction on a story they ran on building a shop air system with PVC due to all the problems. Plastic does not age well and with 100 or more psi running through the lines, even a scratch with a screw driver with the system under pressure can cause the lines to shatter. If you can't afford copper, run black pipe. Or, do what I'm doing and piece meal it as you go to save on the big cost bite all at once. Another benefit to using copper is that the fittings work much better with them than PVC. PVC threads get easily stressed and are not built to take the constant working that air systems have. Pulling a hose and bending the coupler fitting just a little can stress the PVC connection and cause leaks. Even initial connections take some learning to get them just right so they don't leak, and you don't over tighten them. I have heard that PVC is against the law in OSHA eyes. But I've also heard OSHA does not recommend using PVC over 30psi, which IMO makes it pointless anyway. You might get away with 50-60 psi, but over that is just playing Russian Roulette, over and over. Eventually you'll find the right chamber with the bullet. Once the PVC becomes brittle, it can cause shrapnel type projectiles in high pressure failures. Cases have been documented of shrapnel penetrating drywall 30' away Finally, PVC manufacturers do not recommend their product for compressed gasses. [/QUOTE]
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Shops setup for air!!!!!
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