Hinged expansion joints, also known as hinged or angular expansion joints, are specialized components used in piping systems to accommodate angular movement between connected piping sections. Here’s an overview of hinged expansion joints:

1. Purpose: Hinged expansion joints are designed to absorb angular movement or rotation between connected piping sections while maintaining the integrity and alignment of the piping system. They provide flexibility and allow for movement in a single plane, typically in a horizontal or vertical direction.

2. Construction: These expansion joints consist of a bellows element connected to the adjacent piping sections by hinge hardware. The bellows, made of metal (such as stainless steel), are corrugated tubes designed to flex and accommodate angular movement. The hinge hardware allows the bellows to pivot and rotate, providing flexibility in a single plane.

3. Flexibility: Hinged expansion joints offer flexibility in a single plane, allowing for angular movement or rotation between connected piping sections. The bellows element can pivot around the hinge point to absorb angular displacement while maintaining the alignment and integrity of the piping system.

4. Compensation for Angular Movement: Hinged expansion joints are specifically designed to compensate for angular movement or rotation between connected piping sections. This movement may result from thermal expansion, settlement of supporting structures, ground movement, or other dynamic forces acting on the piping system.

5. Application: Hinged expansion joints are commonly used in piping systems where angular movement occurs, such as pipelines connected to equipment with rotating or tilting components, expansion loops in vertical piping runs, or piping systems subjected to angular displacement due to thermal expansion or contraction.

6. Installation and Maintenance: Proper installation and maintenance are essential for the reliable performance of hinged expansion joints. Installation should follow manufacturer guidelines, including proper alignment and support of the expansion joint. Regular inspection and maintenance help identify potential issues such as leaks, fatigue, or corrosion, allowing for timely repairs or replacements.

Hinged expansion joints provide an effective solution for accommodating angular movement between connected piping sections while maintaining system integrity and alignment. Proper selection and installation of these expansion joints are crucial to ensure the efficient operation and longevity of the piping system.