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Recent content by leon_har_dt

  1. leon_har_dt

    External Pressure Stiffner Ring

    Thanks a lot for your answer. Yeah, i thought about knuckle but i face manufacturing limitations from were we cosntruct. Nice to here r6155, fortunately this is a 100% RT equipment. It's seemed odd to me and didnt find any code discrepancy so I preferred to ask Thanks a lot again. L.
  2. leon_har_dt

    External Pressure Stiffner Ring

    Dear All, i hope you are doing Ok, one constructive and code question. Can be a stiffner ring be attached by welding above a groove shell joint? (as mention in the image) I read UG-30, and it doesn't mention or doesn't restrict to do it Why to do it? I'm validating a design of a HX with a...
  3. leon_har_dt

    Vapor Belt Distributor in Heat Exchanger

    Thanks for the answer SnT Yeah yeah, the net area its defined in the phrase I quote. Maybe i didn't make a precise question. My point was, where do i apply this net area. I review the equations related and didn't find a ecc with an area involve. L.
  4. leon_har_dt

    Vapor Belt Distributor in Heat Exchanger

    Hi all! hope you are doing good this days. I was looking in the forum but didnt find any related thread. I'm designing a Heat Exchanger under the ASME Sec VIII div 2. This HX has a Vapor Belt or distributor. In point 8.1.3 says "The longitudinal stress in the shell section with openings (for...
  5. leon_har_dt

    Air cooler header box

    Hi all! as always i tried to look in this forum for an answer with no results. When air cooler header box are welded(full pen with 6 plates) for a ASME header, its common to pre drill, weld and then finish the tube holes and plug holes? or its common to full drill the plates and the weld the...
  6. leon_har_dt

    Maximum Allowable Stress for SB-677 N08904?

    Hi! another way could be with SA213. This year N08904 is integrated in the SA213 (seamless tube). Page 260 of the section II code, part D. I hope it could be helpful. Leo.
  7. leon_har_dt

    Tube to tubesheet shear load test

    Thanks a lot for your answer I read again and it confuse me when the UW20 do a push out configuration but the ASTM E8 do a pull out. It can be interpreted as the same test? Thats why i ask if in the end of the tube it should be weld some piece to perform the push. Here where i come from it can...
  8. leon_har_dt

    Tube to tubesheet shear load test

    Hi all i hope you are doing well. now that this shear load test may be mandatory in 2023, it dont see in figure UW-20.3 how the load is applied. The tube need to have some weld piece in the end for the plunger? Where i can find a real configuration to perform this test? I'll appreciate any...
  9. leon_har_dt

    Seal Weld Tubesheet

    I forgot, about the filler, i dont have enough ligament dimension ( or tube separation) to do a manual gtaw weld with a filler. Thats why i just want to do autogenous weld. its more common in the shop to do. I would do some test with a filler, i think i would be worth it.
  10. leon_har_dt

    Seal Weld Tubesheet

    Thanks for you answer! i always see you replying on these topics and always good responses. I will do some mockup test(I have to test rolling expansion too) so I will take into account the hot crack phenomenon. L.
  11. leon_har_dt

    Seal Weld Tubesheet

    Hi all hope you are doing ok :) Questions: can i do a seal weld between 904L N08904(tube) and 316L(tubesheet) with gtaw autogenous welding? i read that 904l could lose a little of corrosion resistance, but in this case, as only seal weld the tube expansion is in charge to resist forces. Anyone...
  12. leon_har_dt

    Placing a U bend support

    Thanks for the Answer Ed C: Yes! I saw that solution too. I was thinking in a welded "baffle" as well(laser cut this baffle and then cut between rows to place the U tubes finally weld the other on top), trying to support this baffle in the shell(because the U goes from side to side, not from up...
  13. leon_har_dt

    Placing a U bend support

    Hi all! hope you are doing well. I have one question, how does the U bend support are placed in the bundle?. I saw a picture showing that can be welded between rows. But can be placed in one piece? it need a bigger tube hole to allow the bend? I'm attached a reference picture...
  14. leon_har_dt

    Increase asme b16.11 coupling length

    Thanks you for all the answer! This definitely expands all our options and makes me learn a lot :) I will analyze all options and decide which is best for the case. Regards L.
  15. leon_har_dt

    Increase asme b16.11 coupling length

    WOW! really? I would check with my supplier. Thanks a lot for your answer. Still, I'm curious to know if it can be done what I propose.(I'm not always going to find the specific coupling because of the location where we are manufacturing) Regards. L.
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