How to purge the crude oil (fuel oil) pipeline
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The crude oil (fuel oil) storage tanks that were used in the past need to be filled with light oils (naphtha, diesel, gasoline); it is therefore necessary to perform degassing and purging operations on the tanks and pipelines. How should this purging be carried out to ensure that the quality standards for storing light oils are met? I would like to ask about the purging medium, the purging steps, the purging specifications, and the precautions for purging. The measures being taken now are water injection and aeration, nitrogen purging, and ball cleaning with sponge balls. I think it should be hot water for pipe heating and steam for purging.
Displace the oil with hot water, purge with steam, and then replace it with light oil