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[RAFAELDAVE_0752]

Good day, 

I was task to calculate Inlet Diffuser for a tank. Upon calculation, I concluded on having 28 diffuser slot to maximize flow efficiency (0.976 m/s) which must be close to 1. However, the total length recommended is around 5700 mm which is more than 30% of tank diameter based on standard practice. 
Tank Diameter= 10m
Inlet size= DN150, SCH40
Max fill rate= 470 m3/hr 

My question is whether is okay to exceed standard practice (not regulation) to maximize the infuser flow, or are there any standard which can be serve as basis of the calculation. Tried browsing on API650 but there is nothing about diffuser length
 

[breizh]

Hi,

You may find pointers in the papers attached.

Another way to get a good mixing using jet mixers.

https://www.fed.it/i...s-EN-161026.pdf

Breizh

Attached Files

•  perforated pipe head loss.pdf   744.43KB   6 downloads
•  flow in perforated pipes.pdf   1.05MB   5 downloads