scope:

Experimental results of elastic-plastic behavior and plastic limit loads (yield point loads) of five tee-shaped cylinder cylinder intersections and a plain pipe are reported herein. The intersecting models were machined from a single hot rolled steel plate. The nozzle-vessel attachments (or branchpipe tee connections) were subjected to one of the loading modes: internal pressure, in-plane or out-of-plane couples applied to the nozzle extremity. The out-of-plane couple loading is found be be the critical case. However, a comparison of the out-of-plane couple data shows that restraining the nozzle head from lateral movement or increasing the vessel thickness, results in increased load carrying capacity of the nozzle-vessel attachment. The plain pipe was subjected to an external moment loading. The results of this test confirms the validity of a beam analogy for the pipe