4 replies to this topic

[ecovarrubias]

Hi,

I'm sizing orifice plates for a refinery using the ISO 5167-2 standard. This stantard states that it does not cover applications with Reynolds Numbers below 5,000. I have a couple of services where the Reynolds Number. is below this value, so I cannot use the ISO standard as a reference. Should I use another standard that covers this range of Reynols No? Or should I use another type of meter such as positive displacement meter?

Thanks in advance for your reply.

[Steve Hall]

An orifice plate will not give reliable results with laminar flow. Your choice of meters is dependant on factors such as pipe size, content of the pipe, and temperature.

[ecovarrubias]

Thanks Steve for your reply. The pipe size is 2in Sch.40 and temperature is 100 °F for both meters. The fluids are:
- Diesel Oil
Density: 50.70 lb/ft3
Viscocity: 4.48 cP

- Fuel Oil.
Density: 53.20 lb/ft3
Viscocity: 31.31 cP

What kind of meter or measurement technology would you recommend considering this is only for referential measurement.
Thanks

[breizh]

you may consider oval meter :

http://catalog.gpi.n...al-grade-series

Breizh

[Steve Hall]

Also try this source:

http://www.omega.com...e=FPD_sel_guide
http://www.omega.com...=F03&book=Green

Edited by Steve Hall, 28 August 2012 - 09:33 AM.