Lookup temperature, water and saturated steam enthalpy by Absolute Pressure (Bar).
| Pressure (Bar) |
Temperature (°C) |
Water Enthalpy (hf) (kJ/kg) |
Latent Heat (hfg) (kJ/kg) |
Steam Enthalpy (hg) (kJ/kg) |
|---|
Note: The table above uses Absolute Pressure. If the gauge displays Gauge Pressure, please add ~1 Bar to get absolute pressure for lookup.
Symbols: hf = Enthalpy of saturated liquid water, hfg = Latent heat of evaporation, hg = Enthalpy of dry saturated steam (hg = hf + hfg).
Saturated steam is the state where water and steam coexist at the same temperature and pressure. It is the most common heating medium in industry due to its excellent heat transfer properties upon condensation.
Engineers use the Steam Table to:
The table above provides key technical parameters of saturated steam from 1 Bar to 25 Bar. Some important concepts:
Dry saturated steam contains no unvaporized water droplets, providing 100% heat transfer efficiency. Wet steam contains tiny water particles, reducing the latent heat available and increasing the risk of water hammer in pipes.
Generating steam at high pressure (e.g., 10 bar) reduces its specific volume, allowing the use of smaller piping to save costs. At the point of use, the pressure is reduced (e.g., to 3 bar) because lower pressure steam has a higher latent heat (hfg), making heat transfer to the product much more efficient.
According to the table, saturated steam at 10 Bar absolute pressure has a saturation temperature of 179.9 °C.
As pressure increases, the latent heat of vaporization decreases. At the critical pressure (221.2 bar), the latent heat becomes zero, meaning water instantly flashes into steam without boiling.
