Hydrate Formation (Upstream Or Downstream Pressure)

[RAMAN THE]

i have a gas expanding thru a control valve ...upstream pressure is 400 psig and downstream is 50 psig
upstream temp is 80 F and downstream is 50 F

At upstream pressure hysys show hydrate formatiion at 56 F

at downstram pressure hysys show hydrate formation at 35 F

What should be considered ...will hydrate form? since downstream temp. 50 F > 35 F so no formation?

which pressure should be considere for analysis?

 

[PaoloPemi]

given composition, hydrate formation temperature depends from pressure,

see the attached image created with the free online calculator

https://www.prode.com/fluidproperties/hydrate.php

 

[LittleInch]

You need to look at both but from your days it doesn't look like you have a hydrate problem.

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