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Why nozzle opening reinforcement formulas are different in AutoPIPE Vessel compared to ASME Section VIII Div. 1?
ASME Section VIII Div. 1, Fig UG-37.1 gives details only for nozzle opening in radial direction. Need to consider additional parameters for inclined and offset nozzles.
Formula given in ASME Section VIII Div. 1 for Area available in shell (A1) includes area at both side of nozzle center line, But in AutoPIPE Vessel calculates area A1 for one side of nozzle center line, hence considering radius instead of diameter.
Refer first page of Isolated Openings sections (Attached below for reference) for more detailed image and notations like α and β
AutoPIPE Vessel
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