Resistance to Flow Method for Rupture Disks in Two-Phase Flow Service
Resistance to Flow Method for Rupture Disks in Two-Phase Flow Service
(OP)
Does anybody know if the Resistance to Flow Method explained in Appendix E of API 520 Part 1 can be used to verify the capacity of rupture disk in two-phase flow service? The equations API uses are compressible flow equations from Crane Technical Paper No. 410.
I'm thinking that two-phase flow would be considered compressible flow, so then the method could be used. The only difference would be that you would use the specific volume of the two-phase mixture instead of just the vapor. Is this right? Could anyone offer any suggestions about what method they use for rupture disk rating/sizing in the case of two-phase flow? Thanks.
I'm thinking that two-phase flow would be considered compressible flow, so then the method could be used. The only difference would be that you would use the specific volume of the two-phase mixture instead of just the vapor. Is this right? Could anyone offer any suggestions about what method they use for rupture disk rating/sizing in the case of two-phase flow? Thanks.





RE: Resistance to Flow Method for Rupture Disks in Two-Phase Flow Service
Good luck,
Latexman
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RE: Resistance to Flow Method for Rupture Disks in Two-Phase Flow Service
a procedure for sizing a PSV / Rupture Disk for two phase flow based on HEM assumption (homogeneous equilibrium, no slip) generally gives conservative, safe values,
for some cases you may consider HNE or NHNE or introduce corrections for example for high viscosity fluids.
For HEM you may consider a simplified approach (see API Omega) or rigorous available in some simulators.
B.T.W. I utilize regularly the Excel page distributed with Prode Properties and I have posted examples in this forum, good luck.
RE: Resistance to Flow Method for Rupture Disks in Two-Phase Flow Service
RE: Resistance to Flow Method for Rupture Disks in Two-Phase Flow Service