Externally Pressurized Expansion Joints
Externally Pressurized Expansion Joints are built to handle extreme axial travel, with compression capabilities up to 16 inches. They incorporate a built-in guiding system, eliminating the need for the first pipe guide in a piping run. These joints are ideal for steam applications and can be custom-designed with all stainless steel construction, Inconel bellows, and ANSI forged flanges.
| MOTION CAPABILITY | SPRING FORCES | |
| HIGH |  Axial |
MEDIUM |
| NONE |  Lateral |
NONE |
| NONE |  Angular |
NONE |
 |
Diameter Range: 2″ – 24″ |
 |
Temperature Range: -400º F up to 850ºF |
 |
Pressure Range: Full Vacuum to 300 PSIG |
| AVAILABLE ACCESSORIES | ||
 |
TIE RODS / LIMIT RODS | NO |
 |
FLOW LINERS | INCLUDED |
 |
SHROUDS / COVERS | INCLUDED |
Externally Pressurized Expansion Joints are the perfect choice for large amounts of axial compression or extension. Triad Bellows can design externally pressurized metal bellows expansion joints with over 18” total axial movement capability. Other benefits of an externally pressurized expansion joint are that they have a built-in guiding system eliminating the need for the first pipe guide in a piping run. For steam applications, where usually a flow liner is required, externally pressurized expansion joint, due to its construction eliminates this requirement. This type of metal expansion joint also incorporates an outer casing to contain the pressure which also protects the metal bellows from damage.
