INTERNATIONAL EQUATIONS FOR THE SATURATION PROPERTIES OF ORDINARY WATER SUBSTANCE - REVISED ACCORDING TO THE INTERNATIONAL TEMPERATURE SCALE OF 1990 (VOL 16, PG 893, 1987)

In 1987, consistent with the latest experimental data and the internationally recommended values for the critical parameters, we published compact and accurate correlation equations for the following properties on the saturation line of ordinary (light) water substance: vapor pressure, density, enthalpy, and entropy of both the saturated liquid and the saturated vapor [A. Saul and W. Wagner, J. Phys. Chem. Ref. Data 16, 893 (1987)]. As an addendum to this 1987 paper the present paper brings all temperature values and adjusted coefficients in all correlation equations given in the 1987 paper into agreement with the International Temperature Scale of 1990 (ITS-90). The new equations form the basis of the ''Revised Supplementary Release on Saturation Properties of Ordinary Water Substance'' issued by the International Association for the Properties of Water and Steam (IAPWS). This revised release which contains all equations and coefficients adjusted with regard to the ITS-90 is the main part of this paper.