Material of the gas phase line in the oil rejection tank of coking units
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The vapor line of the oil stripping tank in our unit is used to handle the oil and gas pipelines associated with the coking process; it is made of carbon steel. Recently, severe corrosion and perforations occurred in this component, resulting in significant thinning of its walls. What material is used for the vapor lines of oil stripping tanks in other coking units?
1. When the oil and gas enter the vent tower system at temperatures below 230°C, grade 20 steel should be used for the pipeline material； 2. When the oil and gas enter the distillation tower system at temperatures above 230°C, the pipeline material should be 12Cr5Mo ；
Take a look at the design drawings; choose one made of chromium and molybdenum
Ours are all made of carbon steel, and so far there have been no problems