Tank trailers are trailers specifically designed for the transportation of liquids and gases. They consist of a trailer chassis and a large - capacity tank, which can be made from materials such as stainless steel for corrosion resistance, aluminum for lightweight performance, or composite materials for specific applications. These trailers are equipped with pumping systems, hoses, and valves for efficient cargo handling. Safety features, including double - walled tanks, emergency shut - off valves, and leak - detection systems, are integral to prevent spills and ensure the safe transport of goods. Tank trailers are available in various configurations to meet the diverse needs of industries that require the movement of bulk fluids.