Hinged Expansion joints
The hinged expansion joint is made up of a single bellows and some metal articulations with their corresponding pivots, which allow angular rotation along a single plane.
The plates on the articulations and the pivots must be designed to support the force of the pressure, as well as any other specified load.
In cases where axial motion must be absorbed, the holes for the bolts can be channeled, although the resulting design will not resist the force of the pressure.
The hinged metal expansion joint is very good at absorbing angular movements.
Unlike unrestrained axial and universal expansion joints, hinged expansion joints do not absorb large axial loads created by internal pressurisation to the adjacent pipe supports since it is absorbed by the tie rod / bar / hinge arrangement.
What are the key benefits of using a hinged expansion joint in piping systems?
The hinged expansion joint offers several advantages, including the ability to absorb angular movement within a single plane, which is crucial for maintaining the integrity of piping systems under thermal expansion or mechanical stress. Additionally, these joints are designed to withstand significant pressure loads, ensuring reliable operation in various industrial applications.
How do the different types of hinged expansion joints, such as flanged and welding ends, impact installation?
The method of installation can vary significantly between Hinged Metal Expansion Joints - flanged and Hinged Metal Expansion Joints - welding ends. Flanged joints are easier to install and disassemble, making maintenance simpler. In contrast, welding ends provide a more permanent connection that can handle higher pressure, but they require more time and expertise for installation.
What is the difference between single and double hinged expansion joints in terms of movement absorption?
Single hinged expansion joints primarily absorb angular movement in one plane, while Double Hinged Metal Expansion Joints - flanged are designed to accommodate angular and lateral movements. This makes double hinged joints more versatile for systems experiencing multi-directional stresses, providing better overall flexibility and reducing the risk of damage to the piping infrastructure.