For the aerial firefighting aircraft, see Evergreen 747 Supertanker. Crude oil storage tank cleaning procedure pdf oil tanker, also known as a petroleum tanker, is a merchant ship designed for the bulk transport of oil.
There are two basic types of oil tankers: crude tankers and product tankers. Crude tankers move large quantities of unrefined crude oil from its point of extraction to refineries. For example, moving crude oil from oil wells in Nigeria to the refineries on the coast of the United States. Product tankers, generally much smaller, are designed to move refined products from refineries to points near consuming markets.
For example, moving gasoline from refineries in Europe to consumer markets in Nigeria and other West African nations. Oil tankers are often classified by their size as well as their occupation. Some specialized types of oil tankers have evolved. One of these is the naval replenishment oiler, a tanker which can fuel a moving vessel.
Combination ore-bulk-oil carriers and permanently moored floating storage units are two other variations on the standard oil tanker design. Oil tankers have been involved in a number of damaging and high-profile oil spills. As a result, they are subject to stringent design and operational regulations.