Product tanker

A product tanker carries refined petroleum products such as gasoline, jet fuel, diesel, naphtha, and gas oil, kept apart from crude under MARPOL Annex I. Cargo tanks are coated, usually epoxy or zinc silicate, so a clean product does not pick up rust or residue and the ship can switch grades between voyages. The fleet sorts by size: MR (Medium Range, about 25,000 to 55,000 dwt), LR1 (about 55,000 to 80,000 dwt, Panamax beam), and LR2 (about 80,000 to 160,000 dwt, Aframax hull). Coastal and Handy units sit below the MR band. The clean-product trades move refined cargo from export refineries to import terminals.