Learn about steam functions in asset and tag-based analytics

Asset and tag-based analytics tools both include steam functions that calculate thermodynamic properties of steam and water. Both sets of tools provide a complete set of steam functions but are based on different standards and have different implementations.

• Steam functions in asset analytics

  Steam functions in asset analytics are based on the 2007 revision of the IAPWS Industrial Formulation (IAPWS R7-97). The implementation is based on the combination of officially published forward and backward equations for all applicable regions.

  Note: The steam function names in asset analytics begin with "Steam_".

• Steam functions in tag-based analytics refer to the PI PE Steam Functions Module (PI Steam), which is an extension to the PI Performance Equations Scheduler. These functions are based on the ASME Steam Tables, 6th Ed., and are also available in a COM library, PISteamTableFunctions.dll, which is distributed with our other products.

  Note: Tag-based steam functions support both English and SI units; the function names begin with "StmSI_" or "StmEng_" for SI units and English units respectively.