R718 (Water/Steam) pressure temperature chart (PT)
R718 (Water/Steam) saturation pressure vs temperature (PT chart): a CoolProp-generated steam table excerpt in kPa(a), bar(a), and psi(a), plus safe interpretation notes (not diagnostic targets).
This page is a quick steam saturation reference: it connects temperature and saturation pressure for water/steam. This is useful for thermodynamic interpretation, but it is not a diagnostic tool or a replacement for detailed steam tables.
Pressure basis: absolute vs gauge
The table below uses absolute pressure (kPa(a), bar(a), psi(a)). Many gauges display gauge pressure (relative to ambient). Converting requires local atmospheric pressure:
Pabs = Pgauge + Patm
Learn more: Gauge vs absolute pressure (psig vs psia).
R718 saturation pressure vs temperature (steam table excerpt)
Generated using CoolProp (the same property engine used by FluidTool) at Q=0 saturation. Values are rounded for readability.
| T ( deg C) | T ( deg F) | Psat (kPa(a)) | Psat (bar(a)) | Psat (psi(a)) |
|---|---|---|---|---|
| 10 | 50 | 1.228 | 0.012282 | 0.178 |
| 20 | 68 | 2.339 | 0.023393 | 0.339 |
| 30 | 86 | 4.247 | 0.042470 | 0.616 |
| 40 | 104 | 7.385 | 0.073849 | 1.071 |
| 50 | 122 | 12.352 | 0.123519 | 1.791 |
| 60 | 140 | 19.946 | 0.199464 | 2.893 |
| 70 | 158 | 31.201 | 0.312009 | 4.525 |
| 80 | 176 | 47.414 | 0.474145 | 6.877 |
| 90 | 194 | 70.182 | 0.701818 | 10.179 |
| 100 | 212 | 101.418 | 1.014180 | 14.709 |
How to verify any row in FluidTool
- Open FluidTool with water selected: /?fluid=Water
- Choose a Two-phase input pair (Temperature & Quality / T + Q).
- Set Q=0 and enter the temperature from the table to read Psat.
Related
- Water / Steam data sheet: identifiers and thermodynamic context.
- Saturation pressure vs temperature: what Psat(T) means and common pitfalls.
- Critical point: why saturation tables stop at the critical region.
- Back to Wiki
- Open the tool
R717 (Ammonia) pressure temperature chart (PT)
R717 (Ammonia) saturation pressure vs temperature (PT chart): a CoolProp-generated reference table in kPa(a), bar(a), and psi(a), plus safe interpretation notes (not diagnostic targets).
Refrigerant PT chart
How to read a refrigerant pressure-temperature (PT) chart: saturation temperature vs pressure, common pitfalls (gauge vs absolute, blends), and how to verify using FluidTool.