"Smitty Two" wrote in message
news
In article ,
"Ed Pawlowski" wrote:

PVC is not allowed for air use.

If that's true, there's a few thousand machine shops who are breaking
some sort of rule. It's more or less the standard.

Then OSHA has not done an inspection on them.
http://www.osha.gov/dts/hib/hib_data/hib19880520.html

Lots of rules are broken but there is a shortage of inspectors to catch
them. Just as speeding is against the law, many do it,but few are cought.
If there is an accident and someone gets hirt, then look out for lawsuits.