ASME SECTION IX - WELDER QUALIFICATION RANGES

In ASME Section IX, welder qualification ranges refer to the specific thickness and material combinations that a welder has been tested and certified to work with. These ranges are established through a welder performance qualification test, which involves welding a sample coupon of the intended material and thickness, and having it evaluated to meet the required specifications and standards. The following are the common ranges for welder qualification: Plate: For plate materials, the qualification range is typically specified in terms of the thickness and the material group (e.g. Group 1, Group 2, etc.). Pipe: For pipe materials, the qualification range is typically specified in terms of the wall thickness, diameter, and material group. Filler metal: For filler metal, the qualification range is typically specified in terms of the filler metal type and size. It's important to note that the qualification ranges for a welder may vary depending on the code or standard being followed, and the specific requirements of the welding project. It's always best to consult the relevant codes and standards and consult with a certified welding inspector, to ensure that the welder is qualified for the specific welding task.