Expansion Joints are used for compensation of pipeline movements and vibrations Similar to a tyre it has layers of high-quality elastomers reinforced with steel wires and synthetic fabrics. The inner layer forms a tube that extends through the inside of the joint, and across the face of the end flanges. This layer is chemically compatible with regards to its abrasion resistance and temperature rating to the process material. The middle layer of the joint contains the bias-ply synthetic fabric reinforcement that gives the joint its form and pressure rating, with wires used for added strength.

The outer layer is environment compatible usually made of Neoprene, which allows the joint to stand up to contacts with oils, corrosion and weathering. Galvanized or stainless steel retaining rings are provided to protect the flange and distribute forces evenly.

Single, double and triple arches (normal, wide and filled) in axial, lateral and angular shapes are available.