Superheated Steam Table — 30 bar (3 MPa)
Specific volume, internal energy, enthalpy, entropy, density and isobaric specific heat of superheated steam at 30 bar (3 MPa), computed from IAPWS-IF97 — the same formulation the SimuPipe solver uses. Rows run from the saturation temperature (233.86 °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) |
|---|---|---|---|---|---|---|
| 233.86Sat. | 0.066664 | 15.0006 | 2603.3 | 2803.3 | 6.1858 | 3.6123 |
| 240 | 0.068227 | 14.6569 | 2619.9 | 2824.6 | 6.2275 | 3.3435 |
| 260 | 0.072888 | 13.7196 | 2667.8 | 2886.4 | 6.3458 | 2.9070 |
| 280 | 0.077156 | 12.9607 | 2710.7 | 2942.2 | 6.4485 | 2.6854 |
| 300 | 0.081175 | 12.3190 | 2750.8 | 2994.3 | 6.5412 | 2.5431 |
| 320 | 0.085020 | 11.7620 | 2789.1 | 3044.2 | 6.6267 | 2.4463 |
| 340 | 0.088735 | 11.2695 | 2826.2 | 3092.4 | 6.7066 | 2.3794 |
| 360 | 0.092353 | 10.8280 | 2862.4 | 3139.5 | 6.7822 | 2.3327 |
| 380 | 0.095895 | 10.4281 | 2898.1 | 3185.8 | 6.8542 | 2.3003 |
| 400 | 0.099377 | 10.0627 | 2933.4 | 3231.6 | 6.9233 | 2.2780 |
| 420 | 0.102809 | 9.7268 | 2968.5 | 3277.0 | 6.9897 | 2.2632 |
| 440 | 0.106201 | 9.4161 | 3003.5 | 3322.1 | 7.0540 | 2.2539 |
| 460 | 0.109559 | 9.1275 | 3038.5 | 3367.2 | 7.1162 | 2.2487 |
| 480 | 0.112888 | 8.8583 | 3073.4 | 3412.1 | 7.1767 | 2.2467 |
| 500 | 0.116193 | 8.6064 | 3108.5 | 3457.0 | 7.2356 | 2.2472 |
| 520 | 0.119476 | 8.3699 | 3143.6 | 3502.0 | 7.2930 | 2.2497 |
| 540 | 0.122741 | 8.1472 | 3178.8 | 3547.0 | 7.3491 | 2.2538 |
| 560 | 0.125990 | 7.9372 | 3214.2 | 3592.2 | 7.4039 | 2.2593 |
| 580 | 0.129224 | 7.7385 | 3249.7 | 3637.4 | 7.4576 | 2.2658 |
| 600 | 0.132445 | 7.5503 | 3285.5 | 3682.8 | 7.5102 | 2.2732 |
| 620 | 0.135655 | 7.3716 | 3321.4 | 3728.4 | 7.5617 | 2.2814 |
| 640 | 0.138855 | 7.2018 | 3357.5 | 3774.1 | 7.6124 | 2.2902 |
| 660 | 0.142045 | 7.0400 | 3393.8 | 3820.0 | 7.6621 | 2.2996 |
| 680 | 0.145228 | 6.8857 | 3430.4 | 3866.1 | 7.7109 | 2.3094 |
| 700 | 0.148403 | 6.7384 | 3467.1 | 3912.3 | 7.7590 | 2.3196 |
| 720 | 0.151571 | 6.5976 | 3504.1 | 3958.8 | 7.8063 | 2.3302 |
| 740 | 0.154733 | 6.4627 | 3541.4 | 4005.6 | 7.8529 | 2.3411 |
| 760 | 0.157890 | 6.3335 | 3578.8 | 4052.5 | 7.8987 | 2.3523 |
| 780 | 0.161042 | 6.2096 | 3616.5 | 4099.6 | 7.9440 | 2.3637 |
| 800 | 0.164189 | 6.0905 | 3654.5 | 4147.0 | 7.9885 | 2.3753 |
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 30 bar (3 MPa) that pressure term is worth 492.6 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 233.86 °C. Below that temperature at 30 bar (3 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.