Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: pvros
  • Order by date
  1. pvros

    Bolt Torque and Bolt preload query

    It is my impression that there is a little of confusion between bolt torque, bolt tensioning and elongation. Flange tightening is performed by bolt torque (i.e. by wrench) or bolt tensioning (i.e. by hydraulic tensioner). Both methods have some assumption and imprecision for instance the...
  2. pvros

    Nozzle to Shell Weld

    I agree that you may use 6.3(d), just drafting half of the symbol. I'm a bit perplex you are using an "uncommon" weld detail that you even did not know how to indicate, but again, if you are able to qualify it...
  3. pvros

    Nozzle to Shell Weld

    Hi, 1. in edition 2023 of code i see a different detail. Note that figures UW-16 are "some acceptable...", not mandatory. Even if i never seen square groove weld, in particular in shell to nozzle joint, any detail as long as it is qualified with a dedicated PQR should be acceptable. 2. google...
  4. pvros

    A516 GR 60 vs A516 GR 70

    As already asked, what is the point on arguing on gr.60 or 70? Without knowing the real problem, we are just blinding answering you. If certificate says gr.70, formally it is a gr.70. Then, there is a wide overlapping range between gr.60 and 70. They are almost the "same" material. Often...
  5. pvros

    Heat exchanger in hydrogen service

    Question is a little vague and probably not pertinent to this forum since it is not "heat transfer" related. Since it seems you are speaking about shell and tube HE, I suggest you to start reading API 660 and IOGP S-614 recommendation.
  6. pvros

    SA-193 B8 CL2 bolts torque for B16.5 Ring Joint #2500 and #600 application

    Dear FPPE I do not have now b16.5, but have you verified if bolts b8 cl2 are classified as high or intermediate strength? If they are classified as intermediate, you shall perform a detailed calculation and from that you can easily obtain a bolt load to be applied. Total load is the wm1 load...
  7. pvros

    Evaluation of internal corrosion pitting

    Hi, I cannot help regarding the metallurgist phenomena. For an engineering evaluation you may refer to ASME FFS, as stated also on API 510. For repair activity you may check ASME PCC-2
  8. pvros

    Welding inconel 800 ring to 516gr70 body flange

    Check table UCS-56-1
  9. pvros

    Welding inconel 800 ring to 516gr70 body flange

    Hi, I would not accept a proposal per your sketch. Typically, flange type, gasket, material are all decisions taken by client. Generally speaking, what is the internal diameter? Is the shell integral in alloy or CS+CRA? Is really not economical provide an integral flange base on flange...
  10. pvros

    ASME VIII Div.2 - Part 5 - table 5.3 - how to treat temperature and thermal laod

    Thanks for your valuable answer, as usual. I am fully align with you.
  11. pvros

    ASME VIII Div.2 - Part 5 - table 5.3 - how to treat temperature and thermal laod

    Dear All, I am seeking your guidance on table table 5.3 of ASME VIII, Div.2. On table 5.3 are reported several loads combination in design and operating condition with related allowable stressed. 1 - Self-restraining load T Recently, I have seen several reports where temperature is neglected...
  12. pvros

    Fatigue screening - Method B - ASME VIII Div.2 Ed. 2023

    Dear All, as per ASME VIII div.2 ed.23, fatigue screening method B has changed. I am not sure on how to understand certain calculation of the screening. Let check for instance eq. (5.19). The damage associated with the full range pressure cycle is the ratio between the number of full pressure...
  13. pvros

    PTB-3 - E5.2.3 - Stress strain curve data

    I think so, but i do not get your point. It is just my wording not totally correct (i have tried to edit the original post and make it more clear) or i did a trivial mistake?
  14. pvros

    PTB-3 - E5.2.3 - Stress strain curve data

    Dear All, I am replicating the example problem E5.2.2 and I am facing some issue in the inputs. I have created my own spreadsheet as per annex 3D and I am comparing my results with the material input data given at E5.2.3. Why as per E5.2.3 in the tab data elastic strain is considered equal to...
  15. pvros

    ATEX 2014/34/EU and static equipment certification

    Thanks!
  16. pvros

    ATEX 2014/34/EU and static equipment certification

    Dear All, sometimes has happened in my experience that client requires ATEX nameplate and declaration of conformity for pressure vessel. What i was use to do was to check that vessel operating temperature was lower than the temperature limit of the ATEX zone classification and then prepare a...
  17. pvros

    UW-20 tube to tubesheet joint strength ASME VIII Div.1 Ed. 2023

    Dear All, with new code edition, tube to tubesheet joint requirements have been unformed between div.1 and div.2 I have couple of question on code interpretation. May you help me? UW-20.1.1 (d) - for U tube is not necessary to calculate joint strength UW-20.3.1 - "...These rules apply to...
  18. pvros

    Nozzle fatigue analysis for external loads as per ASME VIII Div.2 Ed.2021, Annex 3F

    Thanks both, answers are clear. To sum up: - Agitator cyclically operates with steady state pressure and temperature greater than zero. - FEA for stress evaluation has been modeled considering agitator mechanical cyclic loads and null static loads. - Smooth bar fatigue curve has been used -...
  19. pvros

    Nozzle fatigue analysis for external loads as per ASME VIII Div.2 Ed.2021, Annex 3F

    thread794-336380 Dear All, I am reviewing a fatigue analysis of a vessel with an agitator on the top nozzle which is subjected to external loads fatigue (same situation of the quoted thread). No pressure or temperature fatigue is expected. Vessel is analyze with a FEA considering the the...

Part and Inventory Search

Back
Top