SCBA cylinders service life extension

It is good to see people asking questions on this stuff.....there is a great deal of power in these little tanks....if you think a balloon stings when popped, or one of those pop bottles you fill with air is loud, I can't imagine the sound of one of these things going off.....and the force behind it.

I know a youtube guy shot one and it was enough to scare the ______ out of me....this kind of power is something you don't want to take chances with.
 
The other thing I wonder about with these used tanks.....is it like a motorcycle helmet.....if you take a spill you are not to use the helmet again.....I wonder if these tanks take a hit of some kind are they done for use....perhaps one of our hose draggers on here can fill us in.

I got new CF tank and a used scuba tank from a local dive shop....I sleep well at night and don't worry when filling them.