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  1. s1111

    translate moment from shell/nozzle junction to flange

    thanks doct9960. that is very helpful. Thank u Sntman. regards, s1111
  2. s1111

    translate moment from shell/nozzle junction to flange

    thanks JStephen... that is helpful... Shear forces and Torsional moment are ignored as they have negligible effect in nozzle/shell intersection in most cases... and this is the guideline per the internal spec I am using as no loads were available... while it appears that the moments shall be...
  3. s1111

    translate moment from shell/nozzle junction to flange

    I have axial load(tensile/compressive) and longitudinal and circumferential bending moments at nozzle/shell intersection. Axial load is along centerline of nozzle, circumferential and longitudinal are along tangential axes at shell. I need to check flange on a nozzle and for that the loads need...
  4. s1111

    Applying NBC 2005 Seismic to towers/vessels

    The only consideration at this time is Seismic, and is important to size the skirt thickness. We're not looking at wind currently, but we'll be looking into it sooner or later. Given Tom's comments, a clear understanding is vital for developing per NBC. Thank you again for your valuable...
  5. s1111

    Applying NBC 2005 Seismic to towers/vessels

    everyone thank you for your comments. vesselguy, I did read the NBC 05 seismic loads section under structural sec. However, it does not provide explicitly any application to towers or vessels. As you can see from other users' comments. My question again is how and if it is possible to apply the...
  6. s1111

    Applying NBC 2005 Seismic to towers/vessels

    Does anyone have experience applying NBC 2005 Seismic Code to pressure vessels? I am looking through it right now but am unclear at the moment to its application to vessels and towers. Any help is appeciated. Thank you in advance. s1111
  7. s1111

    Seismic: Response Spectrum Method

    Dear gr2vessels, Did my reply appear negative. I apologize. I took your advice in good spirit. I did read the IS 1893, before I posted the original post, but I could not find much information for RSM other than IS1893. Yes, you're correct in your interpretation I am new to Seismic stuff...
  8. s1111

    Seismic: Zero Period Acceleration & Zone Factor

    Thank you JStephen for your feedback. regards, s1111
  9. s1111

    Seismic: Response Spectrum Method

    Thanks gr2vessels for your feedback.
  10. s1111

    Seismic: Zero Period Acceleration & Zone Factor

    Could someone please explain: 1. Zero Period Acceleration 2. Zone factor Their relation to each other if any (formula). Thank you in advance. Regards, s1111
  11. s1111

    Difference between Response Spectrum Method and IS:1893 RSM

    Could someone please highlight the difference between Response Spectrum Method and IS:1893 RSM (2002)? In particular, I am interested in how IS:1893-2002 could be alternatively modeled using Response Spectrum Method. Thank you in advance. Regards, s1111
  12. s1111

    Seismic: Response Spectrum Method

    Where can I find detailed information for the Response Spectrum Method for Seismic calculations? Thank you in advance for your help. Regards, s1111
  13. s1111

    Seismic calculations

    Dear vpl, Thank you very much for the information. I also found IS-1893 like that. Its not quite surprising to find it so easily. Regards, s1111
  14. s1111

    Seismic calculations

    I did find some references to IS 1893. I will go through them and see if I can find all the necessary information. The IS-1893 is the Indian standard for seismic. Currently, IS-1893 (2002) is latest (it was last updated in 2002). Thank you. Regards, s1111
  15. s1111

    Seismic calculations

    Thank you much GregLamberson and DeanC on you valuable comments. WOuld it be possible for you to point out also where I could find IS-1893. Thanks in advance. Regards, s1111
  16. s1111

    Seismic calculations

    Where can I read about Seismic calculations? In particular I am interested in calculating reactiong at base of the support skirt and how it is derived? Thanks and regards, s1111
  17. s1111

    on the datum

    Thanks Tom for your valuable comments. Regards, s1111
  18. s1111

    On trunion design

    wow, that is pretty insightful. I think I may spend some time with your comments. The trunions are usually for one time lift only, thay are removed after erection. Shackles are used for the lift, the trunion is designed for shackle thickness + some clearance. The trunions are weld in place on...
  19. s1111

    On trunion design

    I am looking for stresses in a simplified model for trunions at a vessel. I am only modeling 1 trunion, in practise there will be 2 trunions 180 degree, for lifting the vessel. The reactions at trunion sum up to the vessel weight. So I'm dividing the vessel weight by 2, to obtain each reaction...
  20. s1111

    on the datum

    Hello, I noticed that when modeling compress the set datum offset, accounts for straight flange length. Could you thorw more light on the functioning of the datum. Thanks in advacen for your comments. s1111

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