5 replies to this topic

[processengineer1998]

Hi all
I am looking for some criteria for velocity and pressure drop/100m for MEG in order to perform line sizing for MEG line and pipeline.
I know general criteria for liquids such as what mentioned in TOTAL or others standards, but interesting thing for me is special criteria(velocity and pressure drop/100m) for MEG .
Please let me know if there is such criteria.
Thanks

Edited by processengineer1998, 16 October 2016 - 10:21 PM.

[breizh]

Hi ,

 

Based on physical properties ( density , viscosity) you should perform hydraulic calculation . Use the search engine in this forum , you will find table or data .

 

Hope this helps

 

Breizh

Edited by breizh, 17 October 2016 - 02:15 AM.

[processengineer1998]

thank you breizh

[processengineer1998]

Is there any concern about 0.5 to 0.6 m/s?

[Saml]

If you are using SS (304L or 316L) you don't have any problem of corrosion, erosion, or passivation layer instability with MEG at usual velocities and moderate temperature (below 100 °C).

The main concern is pressure drop and the power required.

I don't see any issue with 0,6 m/s unless you have a limitation on available pressure drop. Plants that use MEG (like polyester fiber ones) normally use sch 10 SS piping for more than 20 years without problems or loss of thickness.

[processengineer1998]

If you are using SS (304L or 316L) you don't have any problem of corrosion, erosion, or passivation layer instability with MEG at usual velocities and moderate temperature (below 100 °C).
The main concern is pressure drop and the power required.
I don't see any issue with 0,6 m/s unless you have a limitation on available pressure drop. Plants that use MEG (like polyester fiber ones) normally use sch 10 SS piping for more than 20 years without problems or loss of thickness.

Dear Samo
Thanks for your responce.
We are going to use carbon steel pipe in moderate temperature below 70C