WRC - BULLETIN 329
ACCURACY OF STRESS INTENSIFICATION FACTORS FOR BRANCH CONNECTIONS
|Publication Date:||1 December 1987|
This report presents a detailed examination of the stress intensification factor (SIF) formulations for perpendicular branch connections that are specified in American standard codes for use in the design of industrial and nuclear Class 2 and 3 piping systems. The historical evolution of these formulations, beginning with the initial fatigue test data, is discussed first to provide a consistent basis for later discussions of identified problem areas. Solutions to these problems are developed throughout the report and finally summarized as a series of recommendations for specific changes in the ANSI and ASME piping design codes. An Appendix gives recommended code language proposals for revisions to Subsections NC and ND of Section 111, ASME Boiler and Pressure Vessel Code.