For multiphase flow, slugging will normally be an issue. This is likely to affect your model. OLGA is one of the more acknowledged programmes that deals with this, and they base their predictions partly on theoretical calculations, and parlty on empirical data from flow loop testing. or so I am...
I am reviewing leak test procedures for some of our XXV's.
However I have failed to find a simple procedure for a liquid valve which will allow testing at opportune shutdowns (duration typically 1 - 4 hrs).
I've obtained some leak criteria from API procedures (0.1 and 1 kg/s for corrective...