Standards & references
- IAPWS, Revised Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam (IF97) — authoritative Gibbs/Helmholtz formulation and regional bounds.
- Wagner, W. & Kretzschmar, H., International Steam Tables (2008) — tabular cross-checks and educational context.
- Multi-fluid properties (not ordinary water; includes heavy water and CoolProp HEOS/INCOMP): /tools/fluid-properties — batch Excel shares this page’s platform credit wallet; precision IAPWS-IF97 water/steam remains on this page only.
Model assumptions & validity
- Thermodynamic surface: IAPWS Industrial Formulation 1997 for the Helmholtz energy (IF97) with regional equations (r1 liquid, r2 vapor, r4 saturation, etc.) as implemented by the bundled EOS library.
- Transport properties (μ, k) follow the supplementary IAPWS releases referenced by the library; treat them as high-quality estimates for engineering screening, not metrology-grade values without your own validation plan.
- Modes: saturation by T or P returns two-phase property tables at the saturation line; single-phase mode solves (p, T) in the subcooled / superheated / supercritical region subject to library bounds.
Shareable URL (mode + SI state)
The shareable URL sets query key m to Sat(T), Sat(P), or super—saturation from temperature, from pressure, or superheated single-phase (same notation as the UI formulas; fixed URL tokens, not function-call syntax). It also encodes pPa (absolute pressure, Pa) and tK (kelvin). Example: Sat(T) mode with tK only; superheated states need a self-consistent p and T pair. After opening a link, wait for local settings to hydrate, then press Calculate to regenerate tables.
Frequently asked questions
- Is this the same as ASME steam tables?
- It is built on the same IAPWS-IF97 formulation that ASME-compatible steam tables derive from, but any printed table differs by rounding, interpolation grid, and transport-property submodels. Use this tool for reproducible digital checks; cite IAPWS IF97 when documenting assumptions.
- How do batch Excel exports and credits work?
- Single-point verification runs locally in your browser. Signed-in batch table export (saturation sweeps, superheated grids) is generated on our servers. Small saturation tables (≤100 rows, basic columns) are free when signed in; larger exports debit platform credits. Buy credit packs at /metadata; view balance in your dashboard. Purchased credits never expire; promotional credits (e.g. signup bonus) are valid for 12 months.
Extended copy on this page (headings, references, assumptions, FAQs) may be drafted or localized with AI assistance; engineering judgment and governing codes still apply. Numerical models run locally in your browser as implemented. For contract-critical work, cite primary standards and qualified review.