How is welder performance evaluated in a practical test?

Welder performance is evaluated in a practical test primarily by assessing the weld bead characteristics and conformance to the Welding Procedure Specification (WPS). This is essential because the WPS outlines the specific parameters and requirements that must be adhered to in order for the weld to be considered acceptable. Evaluating the weld bead characteristics includes examining aspects such as size, shape, penetration, and appearance, which are critical indicators of a welder's skill and knowledge.

Conformance to the WPS ensures that the welder is capable of following established guidelines necessary for the integrity and safety of the welded joint. This thorough assessment helps ensure that the welder has not only the technical know-how to produce quality welds but can also produce them consistently within the defined standards. Proper weld bead characteristics that align with the WPS signify a competent welder who can produce reliable and safe welds.