These externally pressurized expansion joints were custom designed for 8" axial movement and 150 psig at 176°F, with a spring rate of 2,152 lb./in. They 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. Each unit was hydro-tested, radiographic tested, and dye penetrant tested prior to shipment.
