Rolled and Welded Nozzles with Plate Flanges

Nozzles built-up from rolled and welded plate with plate flanges will generally be required for larger diameter openings, when standard pipe sizes and ANSI B16.5 pipe flanges are not available.

The plate for rolled and welded nozzles with plate flanges must be procured like the plate for cylindrical shell components (see Section 620). Furthermore, fabrication of the cylindrical nozzle barrel is similar to the fabrication of a cylindrical shell component. It is important to note that only full penetration welds are permitted by the pressure vessel model specifications for this type of nozzle, as for nozzles builtup from pipe and pipe flanges.

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