Ejma Standard.pdf !exclusive! -

The EJMA Standard is recognized as the primary global authority for the design and application of metallic bellows expansion joints, offering practical "best-fit" design curves compared to conservative alternatives like ASME. It provides comprehensive equations for stress analysis, though it primarily focuses on bellows rather than full pressure thrust restraint hardware. For more information, visit EJMA Standards . Home - EJMA

What is EJMA?

History and Development

• Pressure Capacity: Ensuring the bellows can withstand internal pressure without rupturing or becoming unstable (squirm).
• Stroke/Movement Capability: Calculating how much the bellows can compress, extend, or laterally deflect without failing.
• Fatigue Life: Predicting the number of cycles an expansion joint can endure based on the stress ranges induced by movement and pressure.