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Recent content by Si-bo

  1. Si-bo

    ASME VIII-1 Nozzle Spacing Clash

    See UG-42: you have to limit the diameter of reinforcement of each clashing nozzle and the software will re-calculate the area required for nozzles reinforcement acc. to UG-37.
  2. Si-bo

    PV Elite tubesheet direction

    It's a matter of which node the tubesheet is connected to. Tubesheet --> tubesheet properties --> element from node --> set the node of left tubesheet flange (should be node 30 according to your snapshot). Than use f8 and the program updates the displacement of the tubesheet.
  3. Si-bo

    Reducing flange analysis using FEA or Div 1

    As the others wrote, your reducing flange is an Appendix 2 integral flange and it needs to be calculated as per it. And there's not much you can do since most parametres are fixed by the 36" flange. You can try making both custom designed flanges and calculate them as per appendix 2: maybe you...
  4. Si-bo

    SA-193 Gr.B7M bolt material used in Wet H2S service is not passing requirement of UG44b clause.

    If you are referring to my comment, evaluating external loads on nozzle's flanges (B16.5) with appendix 2 is generally allowed and accepted by many clients and final users. Most of the contractor's specifications allows both UG-44(b) and Appendix 2 methods, at least in the petrochemical...
  5. Si-bo

    SA-193 Gr.B7M bolt material used in Wet H2S service is not passing requirement of UG44b clause.

    Or you can evaluate nozzle loads on flanges using mandatory appendix 2 method instead of UG-44(b) and mantain grade B7M material. Axial force and resultant bending moment are converted into an equivalent pressure and added to the design pressure of the flange for the calculation. In my...
  6. Si-bo

    PV Elite Report - Tubes of the bundle

    PVelite checks and prints tubes required thickness under internal and external pressure at the beginning of ASME TS calculation. After the sketch of the tubesheet configuration there are elasticity material properties and then tube thickness calculation.
  7. Si-bo

    ASME B 31.3 and ASME B31.8

    Not to be rude but it's not a code issue: you are missing the basic knowledge of mechanical engeneering. Please check the difference between tensile, yield and allowable material stresses.
  8. Si-bo

    API 660 loads on BEM Heat Exchanger Channel with Concentric Cone

    First of all, B16.5 pressure-rating is based only on material of construction, temperature and pressure, corrosion allowance is not rilevant. and B16.5 does not takeinto account of external loads. The nozzle flange is subjected to external loads, so you need to include those in your calculation...
  9. Si-bo

    API 660 loads on BEM Heat Exchanger Channel with Concentric Cone

    Talking about ASME div.1 u-stamped heat exchangers, I've always calculated those kind of nozzles as below: - FEA analysis of the nozzle considering loads applied at the flange-cone junction - Appendix 2 of ASME VIII div.1 calculation of the flange considering additional equivalent pressure due...
  10. Si-bo

    PED or ASME Stamp

    @LittleInch Vessels are not stamped but they are in total compliance with ASME code (materials, NDE, mech. calculations, welding and so on). Then PED certificated. Edit: forgot to mention no U-1 (MDR) needed Hope it's more clear S.
  11. Si-bo

    PED or ASME Stamp

    Here to point out that PED doesn't necessary mean that EN13445 needs to be considered. Calculation code doesn't matter as long as you are in compliance with PED requirements. For example, we usually manufacture PV & HE for EU market designed acc. to ASME VIII div.1 and PED certified. Since you...
  12. Si-bo

    PV Elite design Hub Type Self Reinforced Nozzle (SRN) with LIP

    Check local shell thk. on the bottom right: there you can add the local shell thickness to be considered for the nozzle calculation which is your lip thickness. For the width of the lip, I would limit the material contributing to nozzle reinforcement by adding your lip outside diameter as...

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