Which section of API 1104 offers guidelines for the repair of welds?

The correct section of API 1104 that provides guidelines for the repair of welds is Section 9. This section is specifically dedicated to the requirements and recommendations related to the repair of welds, thus ensuring that any welds found to be non-compliant or defective can be properly addressed to maintain the structural integrity and safety of pipelines and related facilities.

While other sections of API 1104 cover various aspects of pipeline welding, including design, qualification, and inspection, Section 9 focuses on the procedures necessary to effectively repair welds, detailing how to identify issues, carry out repairs, and validate the effectiveness of those repairs. This specificity is crucial for maintaining compliance with industry standards and ensuring the reliability of welded joints in pipeline construction and maintenance.