Engineering Codes, Standards & Certifications

In a vessel protected by a PSV the temperature inside the vessel may reach values higher than those allowable for vessel's materials, for these cases a depressuring system is required.
Prode Properties allows to calculate the temperature when the PSV opens, these values of temperature and pressure can be compared with the MAWP and MAWT and decide if a depressuring system is required.
The basis of the procedure is the flash operation at specified volume and pressure.
The procedure calculates the temperature and phase equilibria when PSV opens.
To define the composition from Excel open Prode Editor, select stream 5 (or whichever you prefer) and define the composition.
In cells B1 and B2 enter operating pressure and temperature,
the procedure will calculate specific volume in cell B3.
In cell B4 enter the discharging pressure for PSV,
the procedure will calculate the fluid temperature at specified discharging pressure.
To view compositions at specified discharging pressure open Prode Editor and select the stream
psvsimul.xls

Tags: depressurization, psv, rating, vessel

Categories

Safety And Environment , Oil And Gas Production , Oil And Gas Process , Petrochemical , Engineering Codes, Standards & Certifications