This Part 11 of this European Standard specifies requirements for unfired pressure vessels and their parts made of titanium and titanium alloys in addition to the general requirements for unfired pressure vessels under EN 13445:2014 Parts 1 to 5. NOTE 1 Cast materials, HIP and additive manufacturing are not included in this version. Details regarding such materials will be subject to an amendment to or a revision of this European Standard. NOTE 2 Materials in Groups 51.4 and 54 are not included in this version.