rsanter
Well-known member
TAftonomos, What was the cost to run copper? I put in the PVC piping for under $50.00 Everything is run in the overhead so I don't see an issue with punctured lines and with a rated 200psi working pressure I cannot see the lines bursting from the air pressure alone, (which a lot of people seem to think) When any kind of pipe is rated there is a generous safety factor accounted for when they give you the WP of the pipe. I think eventually I will convert but for now this is working fine.
The rating of 200psi I am sure os only for water/liquid which is mostly incompressible. The rating for a compress able gas (air) will be half of that or less.
As an engineer myself I had always heard but couldn't see in my head that it would make such a difference. When I was working at a co plant that made fittings, couplings and such they had a machine for burst testing their products. The procedure was to fill with water, bleed out the air, and then continue to pressurize the water inside till failure. The fittings and pipe would be considered failed when they were showing signs of ballooning which was typically at 2.5 or so of the rated operating pressure. They were not bursted but expanded or ballooned.
So I wanted to see what would happen if I did not bleed out the air but rather just installed it and then pumped it up. It exploded like a grenade at around half or a little less of the rated pressure.
It was in an enclosure so no injury, but I now believe.....
Bob