3d-labs

Nozzle Inforcement

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Brand3d-labs
Description
All pressure vessels must be furnished with nozzles and connections. The aim of nozzles is to interconnect the 
pressure vessel with the rest of the process. The most typical practice to join nozzles and pipelines is to use
standard flanges; this ensures a perfect match at assembly and construction stages. To attach a nozzle in a pressure vessel, it is necessary to make a hole in the shell or head body in question.
When making this hole, an area of the vessel is being “taken away”, therefore stress paths are going to divert
tangentially to the hole. Thus, we must “substitute” the removed area by adding reinforcement within the limits. It should be noted that installing a nozzle in a pressure vessel involves a geometric discontinuity that must be
taken into account in calculations. Consequently, every method that could be implemented to reduce existing
stresses is welcome. One of the most commonly used methods consists in removing stress concentrators by means
of rounding sharp edges. This publication discusses about flanged nozzles that are more susceptible to fluid leakage than welded nozzles.
A flanged nozzle consists of the three main elements: flange, neck and reinforcement.