Apart from successful nitrogen displacement during the first commissioning of the liquid hydrocarbon storage tank,
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In addition to passing the nitrogen displacement test when a liquid hydrocarbon storage tank is put into use for the first time, are there any other analyses required, such as dew point?
There should be no such concept as dew point; liquefied gas after desulfurization, as well as that after desulfurization and dew point removal, will inevitably contain water.
A small amount of water in liquid hydrocarbons has little impact; there is no need to determine the dew point – analyzing the oxygen content after displacement is sufficient
Since liquid hydrocarbon storage tanks are equipped with dewatering facilities, does that mean the dew point can be ignored?
It is necessary; it is even more essential in the case of propylene, propane, etc
This is related to the requirements of the storage medium itself; liquefied gases contain water, and water separation operations are necessary, so the dew point is meaningless； For ethylene and propylene, the requirements regarding water content and carbon monoxide content are on the ppm level; therefore, a dew point measurement is definitely necessary ； Additionally, there are also different requirements for storing products such as butadiene and butene-1; it varies depending on the type.