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2+Cr-1 Mo-+ V-ASME Sec. VIII, Div 2 Vessel and Drilled Hole

2+Cr-1 Mo-+ V-ASME Sec. VIII, Div 2 Vessel and Drilled Hole

2+Cr-1 Mo-+ V-ASME Sec. VIII, Div 2 Vessel and Drilled Hole

(OP)
I have a 2¼Cr-1 Mo-¼ V Reactor, ASME Sec. VIII, Div 2 High Temperature/Pressure and Hydrogen Service. Material and fabrication must meet the requirements of API-934A. Considering sensitivity of this material regarding propagation of crack, and all the effort required to avoid crack during fabrication and operation, is drilled hole in the shell of such a Reactor allowed if the hole meets the requirements of Para. 4.3.9 of ASME Sec. VIII, Div 2. I appreciate if anybody can share her/his experience and knowledge in this regard.

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