These externally pressurized expansion joints are 16" in diameter and 60-1/4" face-to-face. The bellows are fabricated from 304 stainless steel, and the rest of the expansion joint is fabricated from carbon steel. They are custom designed for 8" axial movement and 150 psig at 176°F, with a spring rate of 2,152 lb./in. Each expansion joint was hydro-tested, radiographic tested, and dye penetrant tested prior to shipment.