This article is about diameter restrictions and welding position qualification involves in welder and welding operator qualification as per ASME Section IX. Diameter Restriction for Welder Qualification (as per QW-303) 1) If welder is qualified by groove weld during test, then the qualification range will be below (as per table QW-452.3 and table QW-452.6) Note: … Continue reading Welder’s Diameter Restrictions and Position Qualified