Why An Expansion Joint Works Part Two

Why An Expansion Joint Works Part Two

How does a metal bellows flex?

The theory of bellows deflections are discussed along with the EJMA (expansion joint manufacturers association) fatigue curves.

A brief review is given as to how the EJMA fatigue curves were developed.

A comparison is made between the deflection of a metal bellows verses that of a pipe loop for the ‘plastic correction’, or ‘yield’ of the material.

This is a video that is of interest to design, piping, and vessel engineers.

Length: 7:36


About The Author

Greg Perkins
Greg Perkins
President & General Manager

Greg Perkins has 25 years experience in the expansion joint industry. In his previous employment with Senior Flexonics Pathway, Greg Perkins held the position of CEO and General Manager for 11 years. Prior positions include project engineer, director of engineering, and business unit manager.

In addition Greg, a degreed engineer, served on both the EJMA (expansion joint manufacturers association) technical and management committee tasked with developing/updating bellows and expansion joint performance criteria. Proficient in ASME design codes. Patents include high temperature piping restraint structures for expansion joint applications.

Got questions? Need answers? Call Greg today (830) 626-7773 or send him an email [email protected]!