We carry a full line of metal expansion joints and bellows for the chemical, HVAC, marine, power, sewage and water treatment industries. They are available in spool type and sphere type units. Expansion joint connectors are available in bronze and stainless steel. Request a Quote Spec Sheet PDF EXPANSION JOINTS In a small amount of space, expansion joints are able to absorb relatively large degrees of motion caused by pipe expansion and contraction. Expansion joints are used in many industries as flexible connections in pressure and vacuum lines. Our Expansion Joints listed are available in all standard pipe sizes from 1 inch to 72 inch I.D.