U.S. Bellows custom-designed and fabricated 24-inch universal gimbal expansion joints for crude oil pipelines at a power plant in Canada, delivering a robust solution for managing angular movement and system stress.
The bellows were manufactured from ASTM A240 Type 316 stainless steel, providing excellent corrosion resistance and durability. The flanges were fabricated from A105 carbon steel, and the gimbal assemblies were constructed from A516 Grade 70 carbon steel, ensuring structural strength and reliability under demanding operating conditions.
These expansion joints were engineered to accommodate 10° of angular rotation at 285 psig and temperatures up to 100°F. The design includes an angular spring rate of 4,900 in-lb/degree and allows for a vertical offset of 10-1/4 inches, supporting system flexibility while maintaining load control. The overall dimensions of the units are 43″ x 43″ x 110″ and 38″ x 38″ x 79″.
Advanced 3D modeling was utilized during the design phase to verify proper fit-up within the system, perform Finite Element Analysis (FEA) on critical components, and provide the customer with detailed models for integration into their plant design prior to fabrication.
To ensure quality and compliance, each unit underwent hydrostatic testing, non-destructive examination (NDE), and was delivered with complete Material Test Reports (MTRs) in accordance with the client’s specifications.
This project highlights U.S. Bellows’ capability to deliver high-performance, custom-engineered expansion joints supported by advanced analysis, rigorous testing, and value-added engineering services.
