[Woodcarver] Re:High Pressure Air (HPA)

[gjpat at cyberbeach.net]

Hate to be a spoil sport here...but checking out what OSHA has to say on 
this matter is advice that should not be taken lightly.
And to all you folks who say you have had compressed air PVC in your shop 
with satisfactory results for X amount of years, well it is obvious you 
haven't seen what happens when PVC explodes for whatever reason, like 
accidental damage, material failure due to age or deterioration due to the 
presence of oil etc.
Maybe If you have the pvc piping enclosed with shatterproof material, then 
maybe you could be considered safe.
Although I've been retired for a number of years now and it's been some 
time since I did any compressed air system design/specification work, my 
recommendation off the top would be schedule 40 black steel, yea I know 
it's a little bit more complicated of an installation, but from my 
experience schedule 40 black steel piping was the norm back then and I have 
not seen any reason to change now.
BTW when PVC does blow, it aint a pretty sight, it doesn't just break, it 
shatters, with shards of material going all over the place at a high velocity.
This warning goes for Cpvc piping also.

Gordon Paterson

At 09:29 PM 2/9/2005 -0600, you wrote:

>I plumbed my shop air with 1/2 inch sched 40 PVC over 5 years ago. It has 
>reliably held 100 PSI without complaint or leaking. I believe it is rated 
>for over 200 PSI. No shop air system should be run over 100 PSI. Most air 
>tools are designed for 80-90 PSI.  I have a regulator on my compressor 
>before I connect to the PVC with a piece or flexible hose to keep 
>vibration from being transmitted to the PVC. Works good for me. I'm not 
>sure what OSHA thinks.
>
>/Dave
>
>Dave Kratzer
>2421 Oak Tree Lane
>Midlothian TX 76065
>dave_kratzer at iname.com
>Phone: 972-723-0623
>Cell: 214-923-3135
>FAX: 305-489-0320
>http://www.kratzerkomments.com
>
>
>
>
>"dick carter" <rhc511 at hotmail.com>
>Sent by: woodcarver-bounces at six.pairlist.net
>
>02/09/2005 07:28 PM
>Please respond to
>"[Woodcarver]" <woodcarver at six.pairlist.net>
>
>To
>Woodcarver at six.pairlist.net
>cc
>Subject
>[Woodcarver] High Pressure Air (HPA)
>
>I have always piped the HPA for my air tools with soldered
>copper.  I have another line that I want to run & am thinking
>of using Schedule 40 PVC.
>Does anyone have any experience in piping HPA with PVC
>& does the cement hold at the connections?
>
>
>Dick Carter
> >From the Manadnock area of NH
>rhc511 at hotmail.com
>Please check-out my stuff at:
>http://www.picturetrail.com/cartersstuff
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