Four large refractory lined expansion joints shipped to a Southern California refinery. They were 73 inch (1854mm) diameter designed for 50 psig (3.5 barg) at 1450 F (788 C). All cold wall refractory lined. The double gimbal was slotted and designed for large external forces and moments. The tied universal has a perforated metal cover for personnel heat protection. All designs were two ply testable.
This unique design is pressure balanced so no expensive main anchors are needed in the piping system. It also incorporates a gimbaled pantograph allowing lateral in and out of plane. It is a 44 inch (1118mm) cold wall, refractory lined EJ designed for 105 psig (7.2 barg) at 1025 F (552 C). All bellows are two ply testable and internal liners have a 309 braid seal and insulation.