The EN13445 design code is the harmonized design code for unfired pressure vessel design under the Pressure Equipment Directive (2014/68/EU).
EN 13445 gives the rules to be used for design and calculation under internal and/or external pressure (as applicable) of pressure bearing components of Pressure Vessels, such as shells of various shapes, flat walls, flanges, heat exchanger tubesheets, including the calculation of reinforcement of openings. Rules are also given for components subject to local loads and to actions other than pressure.