Welded joins connecting flanges to nozzles are placed under category C weld joints.



some of the questions coming to mind are;

1. Can we consider full penetration butt weld joint between WN flange and nozzle pipe under cat B weld which covers circumferential welds within nozzles? Practically for a full penetration butt weld, keeping it either in cat B or C category will however not make any difference

2. As per the code definition of cat C weld joint " Welded joints connecting flanges to nozzles", are not flanges welded to nozzle pipes considered as a part of nozzle?

Request your interpretation/ advise on the above.

Regards

Sanjeev

The term “Category” as used herein defines the location of a joint in a vessel, but not the type of joint.
Circumferential welded joints within nozzles fall under category B only.

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Raghuram

...except that a butt joint of a (WE) flange to nozzle pipe is cat. C by definition.
But there is no reason to worry, B or C welds are treated the same in the Code, when they are butt welds.
DK