What is usually the cause of a leaking flange joint?

A leaking flange joint can arise from several factors, and recognizing these causes is essential in the field of pipefitting. The answer indicating that all listed factors contribute to flange joint leaks captures the comprehensive nature of the issue.

Poor alignment of flange joints can lead to uneven pressure distribution on the gasket surface, creating gaps where leaks can occur. When the flanges are not properly aligned, they may not create a uniform seal, ultimately leading to fluid escaping from the joint.

Excessive torque applied during the fastening process can also cause leaks. Over-tightening can deform the flange or gasket, compromising their integrity and leading to failures in the seal. It's crucial to follow proper torque specifications to maintain the joint's reliability.

Using incorrect gasket material further complicates the reliability of a flange joint. Different applications require specific gasket materials that can withstand certain temperatures, pressures, and chemical environments. Using an inappropriate material can lead to chemical degradation or insufficient resistance to the operating conditions, resulting in leaks.

In summary, a leaking flange joint can typically result from alignment issues, excessive torque, and the use of unsuitable gasket materials. Recognizing that all of these factors can interplay to create leaks underlines the importance of proper installation and maintenance practices in preventing flange joint failures.