The capacity of the stripping system in tanks that are COWed (Crude Oil Washed) is ____% of the tank cleaning machines, so the tank bottom is “dry” ie, not under a layer of crude oil being washed.

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Multiple Choice

The capacity of the stripping system in tanks that are COWed (Crude Oil Washed) is ____% of the tank cleaning machines, so the tank bottom is “dry” ie, not under a layer of crude oil being washed.

In COWed tanks, you need the stripping system to remove any residual crude from the bottom faster than the cleaning jets apply it, so the bottom ends up dry.Sizing the stripping capacity as a percentage of the tank cleaning machines ensures there’s enough purge flow to push oil out despite surface tension and emulsions. The standard value is 125%, meaning the stripping flow is a quarter again as large as the cleaning capacity, which provides the necessary dryness without overdoing it. Too little stripping (like 90% or 105%) wouldn’t clear the bottom efficiently, while a much larger figure (such as 150%) isn’t typically needed.

In COWed tanks, you need the stripping system to remove any residual crude from the bottom faster than the cleaning jets apply it, so the bottom ends up dry.Sizing the stripping capacity as a percentage of the tank cleaning machines ensures there’s enough purge flow to push oil out despite surface tension and emulsions. The standard value is 125%, meaning the stripping flow is a quarter again as large as the cleaning capacity, which provides the necessary dryness without overdoing it. Too little stripping (like 90% or 105%) wouldn’t clear the bottom efficiently, while a much larger figure (such as 150%) isn’t typically needed.

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