Developed by Russian National Committee (RNC) of
International Association for the Properties of Water and Steam (IAPWS).
This calculation page is based on the
"Revised Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and
Steam"  (named as IAPWS-IF97) provided by IAPWS.
Detailed information about used equations, constants, range of validity etc is presented in PDF version of IAPWS
Release which can be downloaded from IAPWS web site www.iapws.org