B A R R Y wrote:
Robatoy wrote:


That's not a shop-air explosion.

http://www.osha.gov/dts/hib/hib_data/hib19880520.html

With all due deference, the operating pressure of the exploded line was
not given. However, there is no reason for presuming that it exceeded
the pressure under discussion, either. Moreover, further down in the
page a restriction of 100 psi was imposed ... well below your postulated
150 psi.

One of the additional links DID relate specifically to shop-level
pressure and a couple of clearly dangerous failures.

ABS, apparently, ruptures. PVC, just as apparently, shatters rather
dramatically.

Under the banner of erring on the side of caution, would it not make
sense to eschew pvc in favor of one of the other, commonly used, materials?

Your pvc has flexed each time the pressure has changed. That's a lot of
cycles over the lifetime you told us about. The course of prudence would
be to at least shield it.

Bill