In a common overpressure of a cylinder, you'd expect to see one area fail and open, releasing the pressure. This would almost without a doubt be the area that is the weakest area, i.e. an area compromised by a flaw or design feature. If you look at this failure, it failed on both sides simultaneously. It's unlikely that both sides are perfectly equal in strength and, to me, this suggests that the pressure was so high, so quickly, that both sides failed together before the weaker side could fail and vent the pressure. This is the only overpressure failure posted here that I can recall in my short memory where there was a symetrical failure like this. But I could be wrong.

Last edited by Chuck H; 09/20/11 01:37 PM.