"Fred Blair" wrote in message
...

Does anyone know of any pipe other than metal that can withstand 150 psi
for a paint booth application.

Several folks have suggested PVC pipe, and that is a tempting option
because it is cheap. In fact, a piece of 1.5" schedule that I just
purchased is labeled for 330# pressure, more than double the pressure you
mentioned BUT... That rating is for liquid service. Somewhere, there is
another rating for compressed gas usage of PVC pipe and it will have far
lower numbers. See this OSHA warning for more information:
http://www.osha.gov/dts/hib/hib_data/hib19880520.html As OSHA says, the
potential hazard is flying debris from any possible shattering of the pipe.

My opinion:
For a buried installation, I would have no problem with PVC. For exposed
installations, use something else. Years ago, I faced much the same issue
and ended up plumbing my shop with medium diameter air hose. 15 years
later, it still looks like new. (That said, a hose installation may not be
right for a paint booth due to water collecting in low spots. )

Vaughn