Dear Friends/Sirs,

pl give some detail information about SIF (Stress Intensification Factor). How this this related with piping stress analysis?

Raja,

This question has been discussed here many, many times before. Therefore your question indicates that you have NOT TRIED TO HELP YOURSELF. It will not be well received.

This is one of the very fundamental concepts of piping stress analysis - you REALLY need to read some books. Also, PLEASE use the search function that is located at the right side of the page above the calender. Search for "stress intensification factor", "Markl", "books" and "flexibility analysis".

"Background of SIF and Stress Indices for Moment Loadings of Piping Components", by Ed Wais, based upon work by Ed Wais and E.C. Rodabaugh.

http://www.epriweb.com/public/000000000001012078.pdf

John

Use the [Search] feature at the upper right (above the Calendar), and search on "stress intensification factor". You'll find a lot of information on this subject in this forum. You should also hunt up "Markl's" papers published in the 1950's. If you're working with B31.1 or B31.3, review Appendix D.

It is not any thing more than a factor for anticipating cracks in piping joints!it is equal and greater than 1,this factor increase calculated stress.
first time "in piping" it achieved by markle experiments by applying cyclic bending moment on different piping parts.
it is different from scf which is a geometrical coefficient and is not valid in piping material(it is valid for realy brittle material).
but actually there are too many things around it.
regards