5 replies to this topic

[Root]

Hi,
Can some one advice me for slug margin or factor how to include for separator sizing. Shell i can add in design margin or there is some procedure for this.
Thanks
Toor

[Bobby Strain]

Toor,
One should know the size of the slug and its arrival rate to adequately size a separator that also functions as a slug catcher. Most of the commercial programs, like OLGA, can predict slugs reasonably well.

Good luck,
Bobby

[Padmakar Katre]

Hi,
Can some one advice me for slug margin or factor how to include for separator sizing. Shell i can add in design margin or there is some procedure for this.
Thanks
Toor

Hi,
Analysis of the slug is necessary to arrive at the safety factor or over design margin to keep while designing 3-phase separators. I am sorry that I don't have such procedure to evaluate the slug and resultant effect on the separator performance.

[Root]

Hi Padmarkar,
Thanks for your reply, I have got information from Shell DEP there is no need to add slug margin if this not a slug catcher.
Thanks again
Toor

[Propacket]

Hi Toor,

If your separator is to treat a FLUID coming from a pipeline, potential of slugs always exists. Sometimes WELLHEAD production analysis shows less condensate production during initial years and increasing production during later years. In this case, the separator is designed for the highest capacity and the extra capacity available during initial years may also be reffed to SLUG VOLUME. Forget SHELL DEP or any other reference. These are not going to tell you whether slug will come or not. Its only you who can decide if slug volume is is to be incorporated or not. You can name the receiver vessel an inlet separator or slug catcher or whatever, but you have to incorporate slug into the design if it exists.

Regards,
Haseeb Ali

Edited by P.Engr, 10 July 2012 - 02:54 AM.

[Padmakar Katre]

Hi,
I am agree with what Haseeb Ali has written. You need the correct Interpretation of Shell DEP, i.e. phase separators which are designed to take care of slugs, should be designed as per guidelines applicable to slug catcher. You as a process engineer working on this system is the best person to judge/envisage such requirement and to take decision accordingly. If you anticipate that slugs, better to design the separator to cope with.