Tank semi-trailers are capable of transporting impressive volumes of cargo over long distances. The high cross-country ability of the equipment allows to transport fuel to areas where there is no railway line. The capacity of tankers in most cases varies from 18 to 45 m3. Semi-trailers-tanks for transporting petroleum products can be equipped with equipment that facilitates the process of fuel loading. A petrol tanker consists of several compartments, which allows transporting different types of liquids at the same time.