Which section of API 1104 outlines the welding of joints using an automatic process without filler metal?

The section of API 1104 that discusses the welding of joints using an automatic process without filler metal is indeed found in Section 13. This section focuses on the specific procedures and requirements for performing automatic welding, particularly emphasizing techniques such as narrow gap welding and submerged arc welding, which do not require filler metal in the traditional sense.

Automatic welding processes are designed to enhance efficiency and control during welding operations, particularly for pipelines. By using methods that do not introduce filler metal, these processes can yield stronger and more reliable joints, ensuring the integrity of the pipeline over time. Section 13 provides the necessary guidelines to ensure quality and safety standards are met when employing these advanced welding techniques.

Understanding the details in this section is crucial for welding professionals, as it covers critical aspects like equipment setup, welding parameters, and post-weld assessments that are essential for the successful implementation of such methods in pipeline construction.