Range of Qualification for WPS
The range of application of a WPS defines under which technical conditions the welding procedure is valid without retesting. It includes plate thicknesses, material types, and welding positions.
Physicochemical Mechanism of Action
The range of application of a WPS includes the specific parameters within which the welding instructions are valid. These parameters can refer to plate thicknesses, base materials, and welding location.
Metallurgical Relevance & Risks in Welding
If a WPS is applied outside its range of application, undesirable results can occur. For example, the mechanical properties of the weld can be impaired, or cracks and deformations can develop. This can happen especially with different plate thicknesses or material types.
Workshop Practice & Action Instructions
To ensure the WPS is applied correctly, the technical parameters must be carefully observed. This includes the exact plate thickness (e.g., 3 mm), the material type (e.g., steel X5CrNi18-10), and the welding position (e.g., overhead). Any deviation from the range of application requires a new procedure qualification.