Hi everyone, I'm writing a safety case for pressure testing equipment using gaseous nitrogen (hydraulic pressure testing in this case is impractical) and I am trying to estimate the energy transferred to a projectile in the case of something bursting so I can sensibley mitigate against this eventuality. I tried to estimate this by calculating the velocity acheived by the pressure acting on a projectile of given area and mass as it rides the expanding pressure wave and is accelerated by it. The figure I came up with seemed rather low in doing this. Should I just assume that any projectile will travel at the speed of the burst/explosion (which I guess will be the speed of sound)? Or is there a more sensible way of working this out? Many thanks.