I'm assuming you're referring to the ASME EJMA (Expansion Joint Manufacturers Association) standard, which provides guidelines for the design, fabrication, and testing of expansion joints used in piping systems.
: Includes analytical methods for predicting bellows behavior under loads, such as axial spring rates and fatigue life. Key Evolutions in Recent Editions Expansion Joint Manufacturers Association ejma standardpdf
The current benchmark for modern engineering projects. It refined various calculation methods to increase accuracy in predicting bellows behavior. 9th Edition (2008): I'm assuming you're referring to the ASME EJMA
The Standard is the globally recognized authority for the design, selection, and application of metallic bellows expansion joints. Currently in its 10th Edition , the standard provides engineering equations and safety guidelines to ensure the reliability of piping systems subject to thermal expansion and vibration. Overview of EJMA Standards EJMA Standards It refined various calculation methods to increase accuracy
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These are excellent for understanding how to use EJMA without buying the standard first.