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Vortex Breaker in EFR Tanks

Vortex Breaker in EFR Tanks

Vortex Breaker in EFR Tanks

(OP)
Hi for everyone!, Regarding this matter somebody could help me? it is necessary the installation of a vortex breaker in inlet pipe when a EFR is designed?. How can i design it? API 650 does not make some reference! the Floating Roof could be damaged without VB? The EFR is Double Deck type, Tank Dia= 240 ft, Cap=500,000 Bls.
Thanks in advance
22320ajv

RE: Vortex Breaker in EFR Tanks

Emphatically YES.  What is the pipe size and fill rate?

RE: Vortex Breaker in EFR Tanks

I have seen very, very few vortex breakers on tank inlets.  I would tend to answer that they are not needed unless flow rates and velocities require their use.  Also, I also tend to only see them on tank OUTLETS, not inlets.

Joe Tank

RE: Vortex Breaker in EFR Tanks

I agree with JoeTank.  Typically I have seen diffusers on inlets and vortex breakers on outlets only.  Unless it is a combination inlet/outlet.  

RE: Vortex Breaker in EFR Tanks

(OP)
The concern is the External Floating Roof integrity (seals), it could be afected by the crude movement when  is pumping into the tank, Q= 5,000 Gal/min. Pipe inlet Dia= 30". The oulet  42" flow by gravity. API Grav.16
22320ajv

RE: Vortex Breaker in EFR Tanks

22320ajv,

I also tend to agree with Joe that vortex breakers are usually seen at outlets, not inlets. When liquid is withdrawn from a tank or vessel, vortexing could cause some problems like allowing vapor into a pump which could cause cavitation. The process engineer is the one who specifies if a vortex breaker is required because they are the ones who do those hydraulic calculations.

RE: Vortex Breaker in EFR Tanks

22320ajv
I think you could solve your problem by using an inlet diffuser and directing the flow velocity and direction (away from seals).

Joe Tank

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