Boiling Point H20 @ 600 psi???? According to the psychometric chart boiling point of water @ 600 psi is 252 C. I have a chamber with water inside (in forms of weight measured drops). I am purging CO2 at 600 psi in the chamber. After am heating the chamber to 155 deg C expecting the water to stay. It boils or just goes away - I have no idea why it is happening? Could anyone please explain what are the potential reasons that could be happening?