Welding procedure qualification is a document that qualifies the welding procedure specification (WPS). In order to qualify WPS, a procedure qualification plate is welded according to the code requirements. The actual test parameters are recorded at the time of welding to ensure the WPS is being followed. Generally any supporting documentation, such as material specifications, electrode specifications and shielding gas specifications, are included as part of the welding procedure qualification. All required testing, both non-destructive and destructive, is recorded as well. These tests typically include X-ray examinations, ultrasonic examinations, tensile testing, bend testing, and impact testing. The welding procedure qualification combines all of the information of the WPS and adds the test results to provide a complete document that certifies the welding specification.