This European Standard specifies requirements for the design, material, manufacturing and testing of pressure vessels and pressure vessel parts made from materials for which details are specified from the following material standards for specific grades which meet the criterion of an elongation after fracture less than or equal to 15 %: - EN 1561, Founding - Grey cast irons; - EN 1563, Founding - Spheroidal graphite cast irons; - EN 13835, Founding - Austenitic cast irons. The allowed content of the vessel or pressure part is a fluid of group 2 only, according to the Directive 97/23/EC.