In article ,
Jack Stein wrote:
On 11/18/2010 10:41 PM, Ed Pawlowski wrote:

I work in Massachusetts. By law, industrial/commercial air tanks have to
be inspected every two years. Must also have a state tag and permit from
the Dept of Safety before being used. At your home, they don't care.

Is this a hands on inspection, or do they run the thing through an X-ray
machine?
...snipped...

Can't say what they do in Mass. but in Maryland pressure vessels subject
to inspection are hydrostatically tested, i.e. the tank is filled with water,
pressurizing to some value above the rated working pressure, and then
checking for leaks.

--
When the game is over, the pawn and the king are returned to the same box.

Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf. lonestar.org