What is the attachment shown in the provided figure?

A flange is a mechanical component commonly utilized in piping systems to create a secure connection between two parts of a pipeline. It typically features a flat surface with holes for bolts that allow for a bolted joint, ensuring a tight seal between piping sections or between a pipe and a fitting. Flanges enable easy assembly and disassembly, facilitating maintenance or modifications to the piping system without needing to cut into the pipe.

In the context of pipefitting, recognizing a flange is crucial due to its role in the installation and repair of various piping applications. It can support higher pressure loads compared to other connectors, making it suitable for high-stress environments. Knowledge of flanges also includes understanding the different types and standards, which can vary based on the application—such as raised face, flat face, and weld neck flanges—to ensure compatibility and reliability in the system.

Understanding the function and characteristics of flanges is essential for proper installation, reducing the risk of leaks and ensuring the integrity of the piping system.