Internal leakage in the safety valve bypass valve
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During the inspection, it was observed that there was dripping on the wall of the pipeline behind the safety valve bypass valve (the medium inside is liquefied gas). Can it be inferred that there is a leak inside the valve? What physical phenomenon is that drop of water?
It should be the water vapor that absorbs heat during vaporization and then condenses.
The vaporization of liquefied gas is an endothermic process that results in a temperature drop. The decrease in pipeline temperature leads to a drop in the temperature of the air surrounding the pipeline, causing the water vapor already present in the air to become saturated and precipitate out.
The vaporization of liquefied gas is an endothermic process that causes a drop in temperature; this leads to the water vapor in the air surrounding the pipes condensing on those pipes, forming water droplets! ! ! !
The vaporization of liquefied gas requires heat absorption; as the temperature drops, water naturally precipitates out in the air
There are two reasons for sweating in liquefied gas pipelines: pressure relief and internal leakage. The reason for internal leakage and sweating is that liquefied gas is in a liquid state under the pressure conditions in the pipelines, and it leaks into the flare line. Due to the low pressure in the torch line, the liquefied gas vaporizes by absorbing heat, which lowers the temperature of the outer wall of the pipeline, resulting in sweating of the pipeline.