Posted by David - OR on September 01, 2008 at 19:46:43 from (208.67.204.213):
In Reply to: shop air lines posted by oj on September 01, 2008 at 17:50:16:
I use pex-al-pex for my air lines. It is currently running about $0.75 per foot for 3/4 inch from the Blue Ridge company, among other vendors. It is way, way cheaper than copper or steel.
Pex-AL-Pex is a PEx and aluminum sandwich. It is stronger than regular PEX, but retains the ductility of polyethylene. The manufacturer even suggests its use for compressed air.
PVC is unsafe for compressed air. It is banned in the workplace by OSHA, and the PVC manufacturers strongly disclaim any use of PVC for compressed gasses. When PVC fails, it explodes with a brittle fracture mode, sending shrapnel around the shop. If you don't believe this, put on safety glasses and smack a chunk of pipe with a hammer.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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