Thick Wall Expansion Joint designs are identified by a thick ply and high convolution height. They are typically used in heat exchanger applications. Thick wall expansion bellows are usually are manufactured in single convolution with one or more thick ply’s.

Bellows Systems designs both Lens Type and Flanged and Flued Type thick wall expansion joints. Flanged and Flued Expansion Joints typically have higher stiffness and absorb less axial deflection compared to lens type Thick Walled Expansion Joints.

Applicable design codes include ASME B&PV Code Sec. VIII Div-1, Appendix 5 ASME B&PV Code Sec. VIII Div-1 Appendix 26 and EJMA.The most common application for thicker wall/flanged and flued expansion joints is heat exchangers and large diameter piping systems.