well co2 tank is rarely blow up, BUT, if the person fill the co2 bottle mess up, it could be a PROBLEM.
I brough my co2 in for refill, a NEW guy took my bottle and filled it up. He looked lost and confused and another OLD guy had to help him filled it up.
The co2 was colder than before.....I took it home, put it down on the floor and walk away....2 minutes later I hear a sound like air coming out of a tire, however 100 time louder.
I ran to the direction of the sound...and I saw air shooting out of the bottle and the force made it look like a rocket. Big hole in my wall, 3 picture fames broken and everything 2-4 feet from the bottle is like ICE COLD.
It turned out that the guy put too much air into the bottle and the emergency air valve can't take it. The valve had to relieved the air so the bottle wouldn't blow up.
....anyways, I do have a co2 bottle plus co2 regulator for sale, if you interest let me know.