Maximum stress intensities are presented for an equal diameter unreinforced cylinder/cylinder pipe intersection of mean diameter/thickness ratio 24.7, when subjected to the complete set of six individual moment loadings and also internal pressure. Stresses arising from combinations of the moment loadings are considered, and moment/moment and moment/pressure interaction diagrams are presented. From these diagrams the magnitudes of the various load combinations required to cause yielding can be determined. The significance of the results is discussed in the light of British and American piping design codes.

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