This part of ISO 6520 collects andclassifies the possible imperfections in welds made with pressure. A uniform designation is specified. Only the type, shape, and dimensions of the different imperfections caused by welding with pressure are included. Metallurgical deviations are not taken into account. Imperfections produced other than by the welding operation, e.g. additional stresses, loads or environmental factors, are not covered by this part of ISO 6520. Information concerning the consequences of the imperfections mentioned and the use of particular structures is not given, because this depends on the specific requirements of the joint. NOTE In addition to terms used in English and French, two of the three official ISO languages, this document gives the equivalent terms in German; these are published under the responsibility of the member body for Germany (DIN) and are given for information only. Only the terms and definitions given in the official languages can be considered as ISO terms.