Superheated Steam Table — 15 bar (1.5 MPa)
Specific volume, internal energy, enthalpy, entropy, density and isobaric specific heat of superheated steam at 15 bar (1.5 MPa), computed from IAPWS-IF97 — the same formulation the SimuPipe solver uses. Rows run from the saturation temperature (198.30 °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) |
|---|---|---|---|---|---|---|
| 198.30Sat. | 0.131702 | 7.5929 | 2593.5 | 2791.0 | 6.4431 | 2.9645 |
| 200 | 0.132441 | 7.5505 | 2597.4 | 2796.0 | 6.4537 | 2.9088 |
| 220 | 0.140630 | 7.1108 | 2639.2 | 2850.2 | 6.5658 | 2.5718 |
| 240 | 0.148295 | 6.7433 | 2677.6 | 2900.0 | 6.6649 | 2.4226 |
| 260 | 0.155637 | 6.4252 | 2714.0 | 2947.5 | 6.7556 | 2.3291 |
| 280 | 0.162752 | 6.1443 | 2749.2 | 2993.4 | 6.8402 | 2.2669 |
| 300 | 0.169699 | 5.8928 | 2783.7 | 3038.3 | 6.9199 | 2.2254 |
| 320 | 0.176521 | 5.6650 | 2817.7 | 3082.5 | 6.9957 | 2.1980 |
| 340 | 0.183245 | 5.4572 | 2851.4 | 3126.3 | 7.0683 | 2.1806 |
| 360 | 0.189893 | 5.2661 | 2884.9 | 3169.7 | 7.1381 | 2.1701 |
| 380 | 0.196478 | 5.0896 | 2918.4 | 3213.1 | 7.2055 | 2.1648 |
| 400 | 0.203012 | 4.9258 | 2951.8 | 3256.4 | 7.2708 | 2.1632 |
| 420 | 0.209504 | 4.7732 | 2985.4 | 3299.6 | 7.3341 | 2.1645 |
| 440 | 0.215960 | 4.6305 | 3019.0 | 3343.0 | 7.3957 | 2.1680 |
| 460 | 0.222385 | 4.4967 | 3052.8 | 3386.4 | 7.4558 | 2.1732 |
| 480 | 0.228784 | 4.3709 | 3086.7 | 3429.9 | 7.5143 | 2.1797 |
| 500 | 0.235160 | 4.2524 | 3120.8 | 3473.6 | 7.5716 | 2.1874 |
| 520 | 0.241515 | 4.1405 | 3155.1 | 3517.4 | 7.6275 | 2.1959 |
| 540 | 0.247854 | 4.0346 | 3189.6 | 3561.4 | 7.6823 | 2.2052 |
| 560 | 0.254176 | 3.9343 | 3224.3 | 3605.6 | 7.7360 | 2.2152 |
| 580 | 0.260485 | 3.8390 | 3259.3 | 3650.0 | 7.7887 | 2.2256 |
| 600 | 0.266781 | 3.7484 | 3294.5 | 3694.6 | 7.8404 | 2.2365 |
| 620 | 0.273066 | 3.6621 | 3329.9 | 3739.5 | 7.8912 | 2.2477 |
| 640 | 0.279341 | 3.5799 | 3365.5 | 3784.6 | 7.9411 | 2.2593 |
| 660 | 0.285608 | 3.5013 | 3401.4 | 3829.9 | 7.9902 | 2.2711 |
| 680 | 0.291866 | 3.4262 | 3437.6 | 3875.4 | 8.0384 | 2.2832 |
| 700 | 0.298117 | 3.3544 | 3474.0 | 3921.2 | 8.0860 | 2.2954 |
| 720 | 0.304361 | 3.2856 | 3510.7 | 3967.2 | 8.1328 | 2.3078 |
| 740 | 0.310600 | 3.2196 | 3547.6 | 4013.5 | 8.1789 | 2.3204 |
| 760 | 0.316833 | 3.1562 | 3584.8 | 4060.0 | 8.2244 | 2.3330 |
| 780 | 0.323061 | 3.0954 | 3622.2 | 4106.8 | 8.2693 | 2.3458 |
| 800 | 0.329284 | 3.0369 | 3659.9 | 4153.9 | 8.3135 | 2.3587 |
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 15 bar (1.5 MPa) that pressure term is worth 493.9 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 198.30 °C. Below that temperature at 15 bar (1.5 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.