This standard applies to the welding of metallic materials during the manufacture and repair/maintenance of railway vehicles and vehicle parts. It - defines the checks to be executed on the welds, - describes the rules of carrying out the destructive and non-destructive tests, - defines the necessary documentation to issue to declare the conformity of the products. However, additional and more restrictive requirements may be applied if explicitly indicated in the order or contract. The non-destructive and destructive inspections and testings by this part of the standard are carried out in accordance with the appropriate EN standards listed in clause 2 and in the bibliography.