[en] The aim of this paper is a brief discussion of the effect of nozzles interaction in a shell in terms of the gross discontinuity stresses. However, while the peak stress distribution in an isolated nozzle has been largely studied in the open literature, there are not many contributions in this particular field. ASME III code serves as a general reference and its nozzles interaction rules will be compared with the results obtained by this analysis. Besides it is the principal aim of this paper to give a critical contribution in order to study the cases where simplified ASME Codes procedures are not applicable, without drawing a quite general conclusion on this topic. The paper is divided into three sections: analytical tools, a parametric analysis of a few cases, a comparison with ASME III code provisions