The rip in the metal did not happen with a tin opener. It happened violently. Anyone with any engineering analytical skills can see that - an explosion
Its interesting that you start your postings as BigBurner and have now changed into Dr Drivel!
Dr Jekyll and Mr Hyde come to mind!
Actually, you have got it wrong again!
If water below 100°C is pumped up to such a pressure that it causes a steel vessel to burst open then it is NOT violent or an explosion!
Thats why pressure tests are performed with water because its not compressible. Dont you remember when they did that with a Comet plane when you were a little younger?
An explosion is only caused when the vessel contains something compressible like air or steam or a chemical reaction between solids which create a large volume of gas.