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  1. Henzy1977

    "Local" Minimum Thickness for cylindrical shell UG-27

    Hi all, maybe you can help me finding an exception/rule about a uncommon design here below! Thanks in advance, I do not know what to do..... I have a VERY thick ASME VIII Div.1 pressure vessel with internal diameter "di", and on one point there is a drilling "d1" through the thickness as per...
  2. Henzy1977

    ASME VIII Div.1 Annex 2 Bolting Cross-Sectional Area: “nominal stress area” ??

    ASME VIII Div.1 Annex 2 2-3 (Notation) specifies the following definition for Am1/Am2: “total cross‐sectional area of bolts at root of thread or section of least diameter under stress”. I have a to verify a body-bonnet connection of a valve with Annex 2 and the connection is performed using...
  3. Henzy1977

    Small Opening Verification according to ASME VIII Div.2 (4.5.5) - Problem

    Thanks, your analysis is very helpful, makes sense. FYI: You're right the application is not far from B31.3 (even if it is not applicable) but Div.1 U-Stamp should be a mandatory requirement. In fact it is a pressure vessel designed at the max of the rating of class 2500 for SS316. Your idea...
  4. Henzy1977

    Small Opening Verification according to ASME VIII Div.2 (4.5.5) - Problem

    Yes, this is interesting you are perfectly right. Thanks. One more question: I need to comply with Div.1 for such vessel (mandatory requirement) so because of the 3000psi I need to give additional evidence acc.to ASME VIII Div.1 U-1(d): I have selected the verification of Div.2 for the...
  5. Henzy1977

    Small Opening Verification according to ASME VIII Div.2 (4.5.5) - Problem

    The software is custom made but should be ok, it is verified by a thrusted third party and because of this problem I did also an independent xls, the same results. Honestly speaking I think it is not the software: I think I maybe are doing some error in my interpretation of the standard because...
  6. Henzy1977

    Small Opening Verification according to ASME VIII Div.2 (4.5.5) - Problem

    Thanks BJI for you help! Is it in your opinion ok that if I run the calculation with an opening of just 1mm it is still not verified? The method of 4.5.5/4.5.15 seems valid from a minimum size of diameter, below that value does not matter the input value of the opening the verification is...
  7. Henzy1977

    Small Opening Verification according to ASME VIII Div.2 (4.5.5) - Problem

    I am designing a very simple pressure vessel with ID=88mm / THK=21mm / p=400bar / T=20degC. I use the ASME VIII Div.2 methodology, acc.to 4.3.3 the thickness is ok with safe margin. I have also an opening of D=25mm on the side of the vessel (like a drain, there will be a blind flange bolted to...

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