Posted by Stephen Newell on September 17, 2012 at 04:14:08 from (22.214.171.124):
In Reply to: Buried air line posted by Fixerupper on September 16, 2012 at 12:06:15:
I have worked around schedule 40 pvc used for air for 40 years and have never seen or heard from anyone I worked with about a pipe exploding on its own. Depending on the size pipe you use PVC pipe is rated at 270 psi or more for 1" or smaller pipe. I suspect the shrapnel stories are from people that came too close or exceeded that threshold. If you don't need 175 psi, you could regulate the pressure down to 100 psi and it would be even safer. I have worked for people that didn't know they need to properly secure the ends where you attach the air hose to. These I've seen get broken off but there was no shrapnel. I adapt to galvanized pipe to where I can securely fasten the pipe to the wall with the air coupler on it. As far as running underground I have my compressor 50' from my shop and have the pipe run underground and I also have another line run 200 yards to my house run underground with 3/4" schedule 40.
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