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Vortex Breakers in API 650 Tanks

Vortex Breakers in API 650 Tanks

Vortex Breakers in API 650 Tanks

(OP)
How much product should there be above a vortex breaker to ensure vortices do not form in a pump suction line?

There are lot of calculations and thumbrules out there for volume needed above an internal pipe in order to avoid using a vortex breaker, but I don't see any guidance if there is already a vortex breaker. The question becomes- as long as the vortex breaker is covered by product, is there a general assumption that vortices will not occur? I am trying to determine if I can have an internal pipe come straight in to a tank, or if it needs to elbow down. Specifically on this application, I'm use a PIP VEFV1124 cross-type vortex breaker.

This topic is related to minimum level in the tank to operate the pump. ie: if i need 1 ft above the vortex breaker, I may need to shut down the pump at various elevations depending on where the vortex breaker sits.

RE: Vortex Breakers in API 650 Tanks

Some 4-6inches submergence should do it.

RE: Vortex Breakers in API 650 Tanks

Depends on the flow and velocity through the opening as well as the density and viscosity of the fluid and perhaps the vapor pressure of the fluid.

RE: Vortex Breakers in API 650 Tanks

Elbow down will allow you to go lower than the pipe entry elevation.

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