Vapour pressure of saturated steam vs temperature
Dry saturated steam from 100 to 200 °C — saturation pressure, vapour density and latent heat along the boiling line that low and medium pressure steam heating runs on.
Vapour pressure in kPa, from 100 to 200 °C along the saturation curve. The chart and the table below are the same numbers; the table is the one you can copy.
Saturated steam — everything else at 150 °C (default)
| Density | 2.548 kg/m³ |
| Latent heat of vaporisation | 2,113.7 kJ/kg |
| Dynamic viscosity | 0.01419 mPa·s |
| Specific heat | 2.314 kJ/(kg·K) |
| Thermal conductivity | 0.0288 W/(m·K) |
Vapour pressure by temperature
| Temperature (°C) | Vapour pressure (kPa) | Row |
|---|---|---|
| 100 | 101.42 | published |
| 110 | 143.38 | published |
| 120 | 198.67 | published |
| 130 | 270.28 | published |
| 140 | 361.53 | published |
| 150 | 476.16 | published |
| 160 | 618.23 | published |
| 170 | 792.18 | published |
| 180 | 1,002.8 | published |
| 190 | 1,255.2 | published |
| 200 | 1,554.9 | published |
Rows marked published land exactly on a source anchor and are the tabulated figure. The rest are this library’s interpolation between the two anchors either side — good enough to design with, and said out loud so you can decide that for yourself.
IAPWS-95 / ASME Steam Tables · validated 100 to 200 °C · interpolated between 11 published anchors (values held, not extrapolated, past the ends) · saturated state only