Superheated Steam Table — 140 bar (14 MPa)
Specific volume, internal energy, enthalpy, entropy, density and isobaric specific heat of superheated steam at 140 bar (14 MPa), computed from IAPWS-IF97 — the same formulation the SimuPipe solver uses. Rows run from the saturation temperature (336.67 °C) to 800 °C in 20 °C steps.
| T (°C) | v (m³/kg) | ρ (kg/m³) | u (kJ/kg) | h (kJ/kg) | s (kJ/kg·K) | cp (kJ/kg·K) |
|---|---|---|---|---|---|---|
| 336.67Sat. | 0.011489 | 87.0408 | 2477.2 | 2638.1 | 5.3730 | 11.2598 |
| 340 | 0.011999 | 83.3412 | 2504.4 | 2672.4 | 5.4291 | 9.4878 |
| 360 | 0.014229 | 70.2800 | 2617.2 | 2816.4 | 5.6605 | 5.7978 |
| 380 | 0.015867 | 63.0254 | 2696.1 | 2918.3 | 5.8190 | 4.5496 |
| 400 | 0.017241 | 58.0012 | 2760.9 | 3002.2 | 5.9457 | 3.9064 |
| 420 | 0.018460 | 54.1702 | 2817.7 | 3076.1 | 6.0539 | 3.5132 |
| 440 | 0.019576 | 51.0826 | 2869.5 | 3143.6 | 6.1499 | 3.2504 |
| 460 | 0.020618 | 48.5020 | 2918.0 | 3206.7 | 6.2371 | 3.0648 |
| 480 | 0.021603 | 46.2890 | 2964.1 | 3266.5 | 6.3177 | 2.9293 |
| 500 | 0.022546 | 44.3544 | 3008.4 | 3324.1 | 6.3931 | 2.8278 |
| 520 | 0.023453 | 42.6380 | 3051.5 | 3379.8 | 6.4643 | 2.7506 |
| 540 | 0.024333 | 41.0971 | 3093.5 | 3434.2 | 6.5320 | 2.6911 |
| 560 | 0.025189 | 39.7006 | 3134.9 | 3487.5 | 6.5968 | 2.6449 |
| 580 | 0.026025 | 38.4250 | 3175.7 | 3540.1 | 6.6591 | 2.6086 |
| 600 | 0.026844 | 37.2520 | 3216.1 | 3591.9 | 6.7192 | 2.5803 |
| 620 | 0.027649 | 36.1674 | 3256.2 | 3643.3 | 6.7774 | 2.5580 |
| 640 | 0.028442 | 35.1596 | 3296.1 | 3694.3 | 6.8339 | 2.5407 |
| 660 | 0.029223 | 34.2193 | 3335.8 | 3745.0 | 6.8888 | 2.5274 |
| 680 | 0.029995 | 33.3386 | 3375.5 | 3795.4 | 6.9422 | 2.5175 |
| 700 | 0.030759 | 32.5112 | 3415.1 | 3845.7 | 6.9944 | 2.5103 |
| 720 | 0.031514 | 31.7316 | 3454.6 | 3895.8 | 7.0455 | 2.5054 |
| 740 | 0.032263 | 30.9950 | 3494.2 | 3945.9 | 7.0954 | 2.5025 |
| 760 | 0.033006 | 30.2974 | 3533.9 | 3995.9 | 7.1443 | 2.5013 |
| 780 | 0.033743 | 29.6354 | 3573.6 | 4046.0 | 7.1922 | 2.5017 |
| 800 | 0.034476 | 29.0058 | 3613.4 | 4096.0 | 7.2393 | 2.5033 |
u is not tabulated independently. Specific internal energy follows from the enthalpy and specific volume as u = h − p·v, with p in MPa and v in m³/kg (1 MPa·m³/kg = 1000 kJ/kg). At 140 bar (14 MPa) that pressure term is worth 482.7 kJ/kg at 800 °C, so u and h are far apart at high pressure and nearly equal at low pressure — a common source of error when the wrong column is read.
The first row is saturated vapour, at 336.67 °C. Below that temperature at 140 bar (14 MPa) the water is a liquid or a two-phase mixture, and this table does not apply — use the saturated tables instead.
Values are IAPWS-IF97, not interpolated. Every row is evaluated directly from the industrial formulation at that exact temperature, so there is no interpolation error between rows. If you need a temperature between the 20 °C steps, the calculator computes it exactly.