High-Pressure High-Temperature piping Expansion Joints for a Natural Fired Heater at a US AFB.

Design pressure of 1,300 Psi and design temperature of 1,250 F.
Hydrotest at 1,900 Psi

Bellows Systems designed and manufactured one hinged and two gimbal expansion joints for a recent project. The gimbal type expansion joints included one with an external cover and removable insulation.

The bellows materials included Inconel 718 alloy construction with integral root rings and collars. Hinge and Gimbal structural components included 304 SS and 347H SS. 

Hinged bellows were designed to be capable of 7 degrees of angular rotation at design temperature and pressure.