Fundamentals of handling steam

Steam is frequently used as a process medium due to its unique thermal properties. Because of these properties, steam is also inherently dangerous. It is important to understand some of the facts about steam and how it is best handled with hose.
At atmospheric pressure (14.7 psi), water becomes steam, or boils at 212°F (100°C). When under increased pressure, boiling is delayed. At 200 psi (13 bar), the boiling point becomes 388°F (200°C). At 600 psi (40bar , the temperature approaches 500°F (260°C).
If there is water and steam in the system, the steam is said to be in a wet saturated state. As long as some liquid remains, the steam will stay at the boiling point. Any additional heat changes all the water into steam, at which point it becomes dry saturated steam. At this point, additional heat raises the temperature above the boiling point and the steam becomes superheated.


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