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 - Tractor Profile: Allis-Chalmers WD45 (Gas Version) - by Staff. Beginning production in 1953, the WD45 had the same general look as the WD tractor which was produced earlier - but was much more powerful. This was due to the new 4-cylinder "Power Crater" gasoline engine with a 4 x 4-1/2 inch bore and stroke. Some people feel this was one of the most significant tractors offered by Allis-Chalmers in those days. Nothing in its weight or power class could match its performance. In 1954 they began offering the WD45 with the new "Snap-Coupler&quo
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