The Reason for Tank Cleaning and Purpose
Vessels and ocean tankers that carries crude oil and other petroleum
products from one place to final destination or to the refineries, generate
a 1% - 5 % percentage of sludge within the cargo holds and tanks over
time. Vessels using heavy marine fuel oils after a period of 2 - 3 years
or less have about 10 - 20 M / tons of fuel oil sludge collected in
their storage tanks. This oily sludge needs to be removed and clean
out accordingly, some of the purposes are: