2 replies to this topic

[SawsanAli311]

Hi, 

 

I am interested to know if any have experienced a design where saturated liquid from a separator outlet is split in a perfectly symmetrical piping arrangements among two identical subsequent separators operating at the exactly same pressure. The piping were designed for two phase flow.

 

Thanks 

[Art Montemayor]

Saturated liquid does not flow as 2-phases.  It flows like 1-phase, albeit saturated.

 

Only if the piping pressure drop is such that the downstream liquid starts to flash will 2-phase flow originate.  Is that what you mean to state?

Otherwise why mention that the piping is designed for 2-phase flow?

[SawsanAli311]

Hi Mr.Art, 

 

Actually, the liquid lines are at the outlet of a slug catcher vessel having a level control valve on its line. Basically, the routing of the liquid lines from two slug catchers are directed towards a manifold where symmetrical splitting is happening. Therefore, I was asking if there would be any issues of having that liquid (with potential vapor formed downstream the level control valve) creating issues for the distribution. 

In reality, there is a real challenge in having actually no-distribution among this symmetrical arrangement (which is proved to be symmetrical), the liquid is preferentially going to one side than the other. 

 

If you see the path of the liquid after splitting, it has vertical rising piping (three rising points) from the horizontal plane one after the other as the liquid lines is going up to the pipe racks. I think these vertical rising piping is causing flow separation and flashing due to the hydro static pressure drop

 

Appreciate your support & views. 

 

Regards,