WPS certificate – Is it general for all FSW parts or application specific?

The WPS (Welding Procedure Standard) certification is valid for a specific application. It depends on the material, its thickness and the welding configuration. For each application, it is therefore necessary to qualify the weld according to these parameters.
The WPS certification thus describes all the parameters of a quality FSW weld for a specific application. It is obtained after successful qualification tests on prototypes.