The pressure rating is the maximum allowable pressure to be used for that particular expansion joint. Each pressure rating is specified on a case-by-case basis per expansion joint.
![16" Diameter Externally Pressurized Expansion Joints for an Oil Refinery](https://usbellows.com/wp-content/uploads/2017/10/16-diameter-externally-pressurized-expansion-joints-for-an-oil-refinery_6230039345_o-300x156.jpg)
The pressure rating is the maximum allowable pressure to be used for that particular expansion joint. Each pressure rating is specified on a case-by-case basis per expansion joint.