Ethylene and propylene liquids are safely discharged into the cooling tank. The flash point of ethylene is lower than that of propylene; if a check valve is installed at the junction of the propylene discharge pipe and the collection pipe to prevent ethylene vapor at low temperature from flowing back into the propylene pipeline, will this have any impact on the propylene discharge?
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Ethylene and propylene liquids are safely discharged into the cooling tank. The flash point of ethylene is lower than that of propylene; if a check valve is installed at the junction of the propylene discharge pipe and the collection pipe to prevent ethylene vapor at low temperature from flowing back into the propylene pipeline, will this have any impact on the propylene discharge?
Firstly, according to what you’ve described, this would be what’s known as an LD pipeline in our case. Since it’s an LD pipeline, the most basic requirement is complete drainage, and such pipelines are made of low-temperature steel, which gives them a certain capacity to withstand low temperatures. And yet you want to install a check valve; I don’t know what you’re thinking, I don’t understand your exact intention.