hi everyone,



Just for clarification: Any suggestion with regards to this topic is perceptible;

In my practice I don't consider SIF at flange connection in CAESAR II analysis:

What is the significance of considering SIF in flange in analysis in the piping system or in reality?

Thanks.

If you are working to ASME B31.3, have a look at the table immediately following Table D300 (the main SIF's listing). You will find that a weld neck flange has an SIF of 1.0, a slip-on flange (double welded) has an SIF of 1.2 and a threaded flange SIF is 2.3 for instance.

The signficance is of course, the relative time to failure under cyclic loads. In reality, a lap-joint or a threaded flange both have hot-spots, which will logically lead to fatigue failure faster than the smooth taper shape and butt weld in a weld neck flange.

Yes i look at in B31.3 the SIF for flanges.

Thanks for the prompt reply!