Workshop: Application of ASME B31J and Flexibilities with FEA

Professional
24 March 2026 (14:00 to 16:00 CET)

2 Hour Session
Interactive Q&A
Trusted by professionals
Certification included

Why take this course?

In a piping flexibility analysis conform ASME B31.3, SIFs and flexibilities must be taken from ASME B31J. In this 2-hour workshop, including examples, Nikola Jacimovic demonstrates how B31J values were derived using FEA and experimental correlations, and the role these SIFs and flexibilities have on a stress analysis. Let Nikola show you the significance of these underlying equations in the ASME B31J on your work.

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What you'll learn

After this live Workshop you,
-understand the formulations for SIFs and flexibility factors in the ASME B31J
-can quantify the effect of B31J SIFs and flexibilities on sustained and displacement stresses in typical piping systems
-know where and how SIFs and flexibility factors must be applied in a piping stress model, including correct node selection
-understand common modelling pitfalls when implementing B31J values in software such as CAESAR II
-are able to derive SIFs and flexibilities using shell and brick FEA models in line with the methodology used in ASME B31J development
-understand the concept of the twice elastic slope limit, and how it is used to interpret FEA results for application in piping codes

24 March 2026 (14:00 to 16:00 CET)
Instructor-Led 2hr Duration
Online Live Session

About the course

ASME B31J replaced Appendix D of ASME B31.3 as the mandatory source of Stress Intensification Factors (SIFs) and flexibility factors for many piping components. The change was driven by detailed finite element studies and experimental validation, resulting in more accurate characterisation of tees, elbows and other fittings.

Using models of representative piping systems, Nikola Jacimovic demonstrates how the SIFs and flexibility factors in ASME B31J influence calculated displacement stresses, load redistribution and support reactions in a typical flexibility analysis.

The session goes beyond code application. Participants are guided through the procedure for determining SIFs and flexibilities using shell and brick FEA models, following the same principles used in the development of B31J. The role of the twice elastic slope limit in interpreting moment–rotation curves is explained, together with how these FEA-derived values are transferred correctly into a global piping stress model.

The focus throughout is on correct code compliance, modelling discipline and understanding the engineering basis behind the numbers. Your instructor will encourage an open discussion, answering your questions throughout the session, and taking you through worked examples, to ensure you leave with knowledge that you can apply going forward.