supercritical ethylene Temperature effect
supercritical ethylene Temperature effect
(OP)
Dear all,
I have this problem related to an underground ethylene pipeline of +10 kms in length.
There are TSO valves on both sides and it is operated at ground temperature at 90 barg.
The supercritical P and T of ethylene is 50.4 barg and 9.2°C.
Do you need protection for thermal expansion in case a large amount of ethylene gets blocked in? I would guess in case of temperatures > 9.2°C its not necessary as it is a compressible fluid.
But what happens if the temperature drops below the critical temperature but is still above the critical pressure? Will it behave like a liquid? How does the phase transition happen?
Best regards,
SKF
I have this problem related to an underground ethylene pipeline of +10 kms in length.
There are TSO valves on both sides and it is operated at ground temperature at 90 barg.
The supercritical P and T of ethylene is 50.4 barg and 9.2°C.
Do you need protection for thermal expansion in case a large amount of ethylene gets blocked in? I would guess in case of temperatures > 9.2°C its not necessary as it is a compressible fluid.
But what happens if the temperature drops below the critical temperature but is still above the critical pressure? Will it behave like a liquid? How does the phase transition happen?
Best regards,
SKF
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