What is the primary function of an insulating flange?

The primary function of an insulating flange is to minimize metal to metal contact. Insulating flanges are designed to provide electrical isolation between flanged connections in piping systems. This isolation helps to prevent stray electrical currents from traveling through the piping, which can lead to corrosion and other damage. By minimizing metal to metal contact, insulating flanges effectively reduce the risk of galvanic and electrolytic corrosion, thereby helping to protect both the piping system and the materials being transported.

In addition to this key function, insulating flanges are also used to break thermal bridges, which can help in maintaining temperature control in fluid handling systems. However, their main purpose remains focused on providing electrical insulation and preventing unwanted current flow.

The other options, such as enhancing heat transfer, acting as a support structure, and facilitating fluid movement, do not accurately represent the function of insulating flanges. These tasks are typically handled by different components in a piping system. By focusing on electrical isolation, insulating flanges play a crucial role in the integrity and longevity of various industrial systems.