Which information is NOT required to be recorded on the WPS?

The information that is required to be recorded on a Welding Procedure Specification (WPS) is focused on the aspects that directly affect the welding process and the integrity of the weld. Among the options provided, the name of the welder making the qualification test coupon is not typically a required entry on the WPS itself.

The WPS is primarily concerned with specifying the procedures, parameters, and conditions under which the welding operation will be performed, including machine settings, electrode specifications, and procedures for preparation and post-weld treatments. While the identity of the welder may be important in the context of qualification and records, it is not a fundamental aspect of the WPS documentation aimed at ensuring consistent welding quality.

On the other hand, information such as the type of welding machine used, method of surface preparation, and ambient temperature during welding are critical to understanding how the weld will be executed and ensuring compliance with established codes and standards. These factors can significantly influence the weld's quality, mechanical properties, and overall performance. Understanding these requirements helps ensure that welders adhere to specific welding procedures, which is crucial in maintaining the integrity of the welded joint.