API flush plan difference between seal flush and external flush
API flush plan difference between seal flush and external flush
(OP)
Dear Sir
Could you please kindly tell that a trivial question?
The difference be twee self flush and external flush?
Plan 01,02,11,12,13,14,21,22,23,41,51,52,61,71,75,76-self flush.
Plan 32,53A/B/C,54,62,72,74-external flush.
And, beside that, there is many cooling method such as K, M,...
,and how to tell what kind of cooling function work for the
self flush/external flush plan.
thank you very much for your help and reply.
Could you please kindly tell that a trivial question?
The difference be twee self flush and external flush?
Plan 01,02,11,12,13,14,21,22,23,41,51,52,61,71,75,76-self flush.
Plan 32,53A/B/C,54,62,72,74-external flush.
And, beside that, there is many cooling method such as K, M,...
,and how to tell what kind of cooling function work for the
self flush/external flush plan.
thank you very much for your help and reply.





RE: API flush plan difference between seal flush and external flush
02 = no flush
23 = recirculation
51 = external quench blanket
52 = external reservoir (buffer), but not a "flush"
53 = external reservoir (barrier), but not a "flush"
61 = no flush (tagged + plugged for future use)
62 = external quench (different from flush)
71 = gas barrier (tagged + plugged for future use)
75 = condensate containment
76 = vapour containment
Cooling plan use is detailed in API 610 and 682. I suggest you read those standards then ask a specific question. Basically Plans K and M include provisions for seal heat enchangers.
RE: API flush plan difference between seal flush and external flush
Plan 11 is what you are referring to Self flush where the product is circulated from the pump discharge back to seal whereas External Flush Plan 32, this is an external Flush that dilute the process if used.
I have attached the booklet electronically downloaded from the internet
RE: API flush plan difference between seal flush and external flush
Thank you very much for your kindly help and reply.
The other trivial question is :
Is it possible that API Plan 53 and ANSI plan 7353 shown
on the same drawing ( please the attached file)?
Is it possible that all instrument tag (TG, PG, LG) required for API plan 53 also fit in the ANSI plan 7353 ?
Is other like canned motor pump seal plan drawing also required to show up in the P&ID
legend?
Thank you very much for your help.
RE: API flush plan difference between seal flush and external flush
If you are using API pumps you will use API 682 last version plan.
Yes, will instrumentation you like according with suitable standard API or ANSI.
Instrummentation for Seal Plan should be shown on P$ID drawings.
I hope this help.
RE: API flush plan difference between seal flush and external flush
API Plan 51 onwards are for double seal or quenching. The external liquid or gas is not allowed to mix with the pumpage unless seal leaks.