Orifice calibration

[lbvex]

How can I calculate the actual mass flow for superheated steam ?
I have the design data for the orifice but now my pressure and temp have changed.

 

[j2bprometheus]

Ibvex:

from:

http://www.engineeringtoolbox.com/orifice-nozzle-venturi-d_590.html

References
American Society of Mechanical Engineers (ASME). 2001. Measurement of fluid flow using small bore precision orifice meters. ASME MFC-14M-2001.

International Organization of Standards (ISO 5167-1:2003). Measurement of fluid flow by means of pressure differential devices, Part 1: Orifice plates, nozzles, and Venturi tubes inserted in circular cross-section conduits running full. Reference number: ISO 5167-1:2003.

International Organization of Standards (ISO 5167-1) Amendment 1. 1998. Measurement of fluid flow by means of pressure differential devices, Part 1: Orifice plates, nozzles, and Venturi tubes inserted in circular cross-section conduits running full. Reference number: ISO 5167-1:1991/Amd.1:1998(E).

American Society of Mechanical Engineers (ASME). B16.36 - 1996 - Orifice Flanges


j2bprometheus