scope:

This Bulletin contains two reports covering the testing and data analysis of Welded Tee Connections, Flawed Pipes and Branch Connections in pressurized piping systems. Publication of these reports - WRC Bulletin No. 347 was sponsored by the Subcommittee on Reinforced Openings and External Loadings of the Pressure Vessel Research Committee of the Welding Research Council. Burst pressure data available in the literature from 1939 to 1982 for welded tee connections of pipes have been correlated using both the thickness ratios and diameter ratios of branch and run pipe. The correlation indicates that a variation of burst pressure is weak with thickness ratios for constant diameter ratios but significant with diameter ratios for constant thickness ratios but only when the thickness ratio increases toward one.