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  1. Sergio76

    SA-36 for low temp on non retaining parts.

    Hello everybody, i have a spherical desander at 5000 psi, which was constructed for the American market at MDMT-20, now the Canadian market is interested in this equipment but the MDMT is -40, the non pressure retaining parts such as name plate, lift lugs, skirt and base plate are made form...
  2. Sergio76

    pipe failure

    Hello all, after some weeks figuring out about the cause of this failure, it was determined that excess vibration during transportation started this failure, then when the equipment was in operation the additional loads acting on the pipe increase until it fail. I discovered as well that welding...
  3. Sergio76

    pipe failure

    Dhengr, have you seen this type of crack on similar applications with this kind of supports? The suggestion stated by Littleinch is appropriate to fix this issue, my only concern is the cost of this repair, since as I mentioned before, those are a non code vessels and the customer is cheap on...
  4. Sergio76

    pipe failure

    here is the filehttp://files.engineering.com/getfile.aspx?folder=7c1bee70-e475-42e2-a593-f3a9f0994e06&file=Trsp_Pic_1.pptx
  5. Sergio76

    pipe failure

    Good morning All, dhengr,the vessels were hydro as you stated, and they started leaking 30 min after they have been in service, apparently the transportation and erection procedure were good, but really I don't have much information about that, only a few pictures similar to the first one. The...
  6. Sergio76

    pipe failure

    Littleinch, thanks and thanks a lot for your suggestions, I will perform a FEA to figure out what are the critical points, and from them I will suggest the better and most economical solution. if someone else have another idea, please share with me. thanks to all
  7. Sergio76

    pipe failure

    to clarify the picture showing the U bolt, this is not implemented yet as a repair procedure, the customer just come out with this idea as they did that type of brace for a firetube stack, we want to provide the better solution to be free of future issues and to provide a better design for...
  8. Sergio76

    pipe failure

    Snorgy and Littleinch, as I mentioned before, I am agree in that this design is really poor, by the way this is a non code vessel. Littleinch I didn't understand exactly when you say: "this support needs to have a collar welded to the pipe with circumferential welds and then the support welded...
  9. Sergio76

    pipe failure

    good morning all, and thanks for your inputs...some answers to your questions and comments: Marty007, there is not really a temperature difference or thermal expansion, the pipe has only one support at bottom close to the flange. Metengr, I am agree with you as I mentioned it looks like due a...
  10. Sergio76

    pipe failure

    Hello all, I have some equipment as shown in the pictures that have a pipe failure at the support attached. This is a Vertical Recovery Tower 30" OD X 30' S/S operating at 50 PSI @ 100 F. According to the field foreman, the vessel started leaking 30 min after operation start. my concerns about...
  11. Sergio76

    Vent holes in a Skirt support

    Hello all, i have some vertical separator vessels with a skirt support, those are code vessels, my question: is it required per ASME code add vent holes in the skirt? if so, how many and what are their typical size and location? what is the code reference paragraph that state this requirement...
  12. Sergio76

    beam deflection L/360

    thank you guys, i appreciated.
  13. Sergio76

    beam deflection L/360

    thread507-37706 Hello Everybody after reading the reference thread i just want to figure out the meaning of 360 on the deflection parameter, where this number came from? it has any units? if my deflection calculations are in metric units i use the same value? what are the conditions to compare...
  14. Sergio76

    nozzle pad installation

    Hello everybody, i just want to know if there are some requirements per ASME code in the installation of nozzle repad, if not, what is the standard practice on 2-piece pad installation?
  15. Sergio76

    anchor bolt calcs for skid

    thanks guys, i am mechanical and i know the responsability of this kind of cals is from structural engineers, my question is just basic, assuming only wgt and wind load, i just want to create a basic spread sheet to have in hand, just for aproximation to the bolt qty and size, for the proposal...
  16. Sergio76

    anchor bolt calcs for skid

    i have various equipments mounted on a skid, i have the total wgt and wind load, this skid is anchor concreate bolted, what are the basic formulas to determine the bolt size and quantities, after some searching i found those calcs are besed on ACI 318-08, is there any free site to download this...
  17. Sergio76

    vessels in a barge

    the vessel weight is 52000 lb aprox. and the barge dims is 32' x 131'
  18. Sergio76

    vessels in a barge

    I have a vertical vessel which will be operating on a barge, this is a huge vessel (102" OD x 732" overall dims including the skirt), what is the movement impact on the vessel thks and what procedure or formulas i have to consider to add that extra load on thks calc? Thanks.
  19. Sergio76

    skirt openings

    Hello guys, after reading some post about this topic, I just wonder if every time we have an opening in skirt support, it is required to replace the area?, what is the calculation method?
  20. Sergio76

    o-bround reinforcement

    Hello guys, I have a vert. heater treater vessel where the opening is an o-bround shape, vessel is 72" OD and the o-bround is 27"W x 48"H, to calculate if the reinforcement is required, as this is a large opening, probably i need to use appx 1-10, my question is how i treat the shape geometry...

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