This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Thanks for that, Rob. I remember a neighbor saying sometime ago that = pvc was not to be used for air though it is rated for 600 lbs pressure. I've had it in my ceiling for years. I was oot and aboot today (little = canydian lingo there.) Home Depot has red copper and blue copper but = don't know the difference. A plumbing shop down the street, said that = it was the thickness of the copper. There is green, blue and red. He = said that Green is made for air and is cleaned on the inside (used in = hospitals etc.) Also expensive. =20 The link said that ABS is okay, but they don't make it in less than 1 = 1/2 inches. Here's my beef! I haven't been able to get pressure rating anywhere. I = spent an hour on the net and looked at McMaster Carr etc. Lotsa = rhetoric but no specs. I'm sure the rating depends on the diameter. I give up. Guess I'll just go with 1/2 inch blue and hope it works. =20 BTW, I love air. Except from politicians. Carl Meyer Ptg assoc Santa Clara, Ca. ----- Original Message -----=20 From: Rob Goodale=20 To: 'Pianotech'=20 Sent: Thursday, March 18, 2004 8:24 AM Subject: Journal Artical - BAD IDEA! Journal Article - BAD IDEA! I was reading an article in he latest PTG Journal, (March, 2004), when = I identified a major hazardous no-no. The article is on page 25, = "Finishing Pianos: The Jewels of the Furniture World, Part 6. In the article it recommends using PVC pipe for plumbing your shop = with compressed air to a stationary compressor. This is a subject that = I had already been exploring, as I am intending on plumbing my shop for = compressed air with multiple tap points throughout the shop. Here is the problem: PVC is designed for transporting non-flammable = liquids, i.e. water, NOT compressed air or gasses. Under pressure PVC = becomes very rigid and non-flexible. PVC plastic does not expand, it = explodes! In such an event it shatters like glass sending flying shards = in every direction. There have been mulitiple reports of serious injury = resulting from exploding PVC line being used for compressed air, = including the relatively low, (55-130 PSI) pressures generated by common = shop compressors. It is tempting to use PVC because of it's cheapness, = easy installation, and high resistance to corrosion. Unfortunately it = is not a wise solution. Use copper or steel pipe only, not PVC!!! The following links will take you to credible data on why not to do = this, (including OSHA data which forbids PVC for compressed air). http://wolfstone.halloweenhost.com/LocalMirror/hib19880520.mht = http://www.lni.wa.gov/Safety/KeepSafe/HazAlerts/902.ahttp://wolfstone.hal= loweenhost.com/LocalMirror/hib19880520.mhtsp http://www.woodcentral.com/bparticles/airpiping.shtml Rob Goodale, RPT Las Vegas, NV ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/c8/cb/df/24/attachment.htm ---------------------- multipart/alternative attachment--
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