[Woodcarver] Re:High Pressure Air (HPA)

[Mike and Patty]

I have to dido this --
Getting away with it for years is by no means to say it is safe.
Under pressure with something being dropped on it can easily send someone to the morge or the Hospital--
It isn't worth  the risk to eyes or life.
thanks for being the spoil sport With a very good heads up.
  ----- Original Message ----- 
  From: gjpat at cyberbeach.net 
  To: [Woodcarver] 
  Sent: Thursday, February 10, 2005 11:42 AM
  Subject: [Woodcarver] Re:High Pressure Air (HPA)


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  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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