Which section of the ASME codes deals with welding?

The section of the ASME codes that specifically addresses welding is Section IX. This section outlines the rules for welding and brazing qualifications, emphasizing the importance of proper welding practices in ensuring the integrity and safety of pressure vessels and piping systems. It provides guidelines for both welders and welding procedures and includes requirements for qualification tests to ensure that personnel are capable of producing welds that meet necessary standards.

By focusing on the details related to welding, Section IX ensures that the qualification of welders and the procedures they use are consistent and reliable. This is critical in maintaining the safety and performance of equipment that operates under pressure, as weld quality can significantly impact the structural integrity of such systems. Sections I, IV, and VII of the ASME codes pertain to other areas, such as power boilers and heating boilers, but they do not specifically focus on the welding processes and qualifications as Section IX does.