API Flush Plan for HSRN and RCO
API Flush Plan for HSRN and RCO
(OP)
In one of the jobs I have to specify a pump which will operate on 02 services. One service is HSRN (Heavy Straight Run Naphtha) and the second service is RCO (Reduced Crude Oil).
The Max Temperature for HSRN Case is 179 deg F and for RCO Case it is 588 deg F.
For HSRN case API Flush Plan 11 is acceptable. My Question is can this same flush plan be used for RCO service as well?
My other question is can I specify API Plan 23 for this job as well?
Remember the same pump has to operate on both services.
Thanks
The Max Temperature for HSRN Case is 179 deg F and for RCO Case it is 588 deg F.
For HSRN case API Flush Plan 11 is acceptable. My Question is can this same flush plan be used for RCO service as well?
My other question is can I specify API Plan 23 for this job as well?
Remember the same pump has to operate on both services.
Thanks





RE: API Flush Plan for HSRN and RCO
Johnny Pellin
RE: API Flush Plan for HSRN and RCO
Actually the specified pump is the part of a closed drain system for a refinery and takes suction from a vessel which receives drains from different equipment of the refinery through closed drain piping. So the pumping service is diversified and it is first time for me as well to specify a single pump for two services.
Plan 31 is a variation of Plan 11 with the inclusion of a separator. One more question...Can I use a metallic below type seal instead of pusher type and remove the throat bushing and stick to the plan 11 for both services?
RE: API Flush Plan for HSRN and RCO
What about temperature effect on Seal it self? As in case of Plan 11 OR 31 the RCO would be going to the seal at a max temperature of 588 deg F.
Thanks and Regards,
Haroon
RE: API Flush Plan for HSRN and RCO
In any case, I would design the seal for high temperatures using bellows seals and high temperature gaskets. I would probably add a steam quench (Plan 62) for the atmosphere side of the seal to reducing coking.
In your original post, you described this as a pump with two services. This suggests that it would see either one or the other. In your second post, it makes it sound as if this is a slop pump that could see any mixture of streams across the full range from heavy naphtha to reduced crude. That makes a difference. If the pump has to be able to pump whatever stream is dumped to slop, then my suggestions would change.
I would use a metal bellows seals with high temperature gaskets and hard faces. I would pipe it up with Plan 32 outside flush if available. If clean flush was not available, I would use a Plan 11/62.
I should have asked more questions to understand your service before I commented.
Johnny Pellin
RE: API Flush Plan for HSRN and RCO
RE: API Flush Plan for HSRN and RCO
We do not know all the facts - but I have never heard of a pump being used for such a vastly difference of temperature without progressing being taken to the right temperature - process which takes a long time