Version 12 and Above
|115||Fluid changes state, static pressure < fluid vapor pressure||The Fluid Zone associated with a Device is a Liquid and the Static Pressure at that Device is calculated to be less than the Vapor Pressure of the Fluid Zone.|
|116||Fluid changes state, static pressure > fluid vapor pressure||The Fluid Zone associated with the Device is a gas and the static pressure at the inlet or outlet of the Device is greater than the Vapor Pressure of the Fluid Zone.|
Version 2009 and Before
Fluid Changes States (Nodes, Demands, Tanks, Components, Control Valves, and Pumps):
When the user selects a fluid, based on the temperature and pressure entered, PIPE-FLO will determine if the fluid is a liquid or a vapor, and fill in the density, viscosity, specific heat ratio (for gases) and vapor and critical pressure (for liquids).
If a fluid changes states warning occurs when the fluid is liquid, it means that the vapor pressure calculated by PIPE-FLO is below the vapor pressure. If a fluid changes states warning occurs when the fluid is gas, it means the pressure at that point in the system went above the vapor pressure for that fluid.
This warning is also generated if pressure is above the critical pressure.