What is true about weld outlets?

Weld outlets are specifically designed to enhance the strength of branch connections in piping systems. This characteristic primarily stems from the way they are integrated into the main pipe, forming a reliable and durable joint. When compared to stub-in connections, which may not provide as much structural integrity, weld outlets facilitate a more robust connection. The welding process helps to fuse the outlet securely to the main line, dramatically improving the overall strength and reducing the likelihood of leaks.

The other options do not accurately reflect the capabilities and applications of weld outlets. They are not limited to horizontal pipes; in fact, they can be applied to vertical applications as well. While certain welding techniques may be preferred for quality and safety, the use of a "special" type of welding technique is not a defining characteristic of weld outlets. Additionally, it is incorrect to suggest that they create a weaker connection compared to stub-in connections, as this statement contradicts the inherent design advantage that weld outlets offer in maintaining the structural integrity of the piping system.