Flexible joints are specialized connections in structures that allow for movement and flexibility. They are commonly used in buildings, bridges, and pipelines to accommodate changes in temperature, pressure, or ground movement. This flexibility helps prevent damage by absorbing stress and reducing the risk of cracks or breaks. These joints can be made from various materials, including rubber, plastic, or metal, depending on the application. For example, in plumbing systems, flexible joints help manage vibrations and thermal expansion, while in construction, they allow for slight shifts in the structure without compromising stability.