Universal expansion joints are versatile, double-bellows piping components designed to absorb large amounts of combined axial, lateral, and angular movement, primarily in long piping runs. They utilize two bellows separated by a center pipe spool, allowing for significant lateral deflection, and are often equipped with tie rods to control pressure thrust and distribute movement.
Key Features and Design
Structure: Consists of two corrugated bellows segments connected by a center spool pipe.
Movement Capabilities: Engineered for large lateral deflections, in addition to axial expansion/contraction and angular rotation in multiple planes.
Tie Rods/Limit Rods: Often included to prevent over-extension, absorb pressure thrust forces, and ensure the center pipe remains stable, particularly in high-pressure systems.
Material: Frequently constructed from stainless steel grades (e.g., 304, 316, 321, 316L) for durability and corrosion resistance.
