4.2.2.3. A Welder Performance Qualification (WPQ) program for training and certifying all welders and weld operators established and maintained for the welding of stainless steel alloys. The program shall include: 4.2.2.3.1. Basic joint-type and weld position per the criteria in Performance Qualification section of AWS B2.1 or equivalent. A Welder Procedure Qualification Test Records (WPQTR) shall be used to evaluate and track qualifications of welders/weld operators.4.2.2.3.2. If applicable, specific Applied Materials welds per the acceptance criteria on drawings and this specification. A Welder Procedure Qualification Test Records (WPQTR) shall be used to evaluate and track qualifications of welders and weld operators.