Transmix/Interface in pipelines

[Augusto5]

Hi everybody;
I'm in the operations sector of product pipeline. One of the worst problems we have is the transmix generated between the Naphta for petrochemical (NVI) process and the Butane (BTN). Typically, the interface volume begins around 50 m3. To the terminal station arrives around 200 m3.
Resuming, I need some help with the transmix problem. Maybe, somebody could tell me how much each factor acts. As operator, I can set some conditions, such flow rate, pressure, pressure drop (bypassing prover). But the question is, how can I minimize the volume generated of interface?
I can send you any other specific information or installation's diagrams if you need.

I'll thank you a lot your help.

P.S.:I'd like to get in contact with people in the operations sector of product pipeline and oil pipeline.

 

[zdas04]

Agusto5,
It is usually a bad idea to post the same question im more than one place. Either here or at thread378-149515 would be fine, but putting the exact same question in both places starts independent conversations and neither conversation has all of the inforamation.

If you're trying to broaden the number of people who see a post, the best way to do that is to append a paragraph on the end of the post in the least active forum saying "I've cross posted this at thread378-149515 , please follow this link to post replies" or something to that effect.

David

 

[BigInch]

Keep your flow velocity as high as possible, the faster you go, the less interface you'll generate. The rest is pretty much out of your control, as it depends on the mixing coefficients between the two products placed next to each other, the diameter of the pipeline, etc. Usually better to place the higher viscosity product after the lower, but its often not practicle.

P.S. Don't ever stop the pipeline with an interface in the line.