Pressure vessel
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miron1234
The question concerns to flanged nozzle welded to pressure vessel shell.

ASME CODE, Sec.Vlll, Div.1
UG-36,(c),(3) Openings ...do not require reinforcement...under...conditions:
(a) welded connections:
1) According to the first sentence of (a) : opening 50 mm diameter in vessel shell 8 mm in thickness does not require reinforcement;
2) According to the second sentence of (a) : opening 50 mm diameter in vessel shell 8 mm in thickness requires reinforcement.
Kindly I ask explanations
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