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Recent content by migueldiazch

  1. migueldiazch

    Pressure vessel boot sizing

    Thank you very much. Very helpful... M.D
  2. migueldiazch

    Pressure vessel boot sizing

    Hello everyone, Searching the internet I found the BN-EG-UE109 Guide for Vessel Sizing which stablish that the sizing of the boot diameter shall satisfy the following criteria "The boot diameter shall not be more than 0.5 times the vessel diameter", our practice stablish that for vessel...
  3. migueldiazch

    Percent Head Rise" and "Percent Head Reservation

    Thanks for the info. Very helpfull M.D
  4. migueldiazch

    Percent Head Rise" and "Percent Head Reservation

    Reviewing some Project BID Tabulation documents for API 610 Pumps I found the term "Percent Head Rise" and "Percent Head Reservation" as a requested specification. For some services the Percent Head Rise was limited to >120 for others the number was <120 and in some service there were no...
  5. migueldiazch

    Gasket issue

    No, we can not tolerate a leak
  6. migueldiazch

    Gasket issue

    Hello, The MEA filters that you can see in the attached file uses spiral wound gasket for the cover flange with hoop: 304, filler: graphite, inner ring: 304 and outher ring: C.S, we do not have that gasket availlable right now. Can we make a gasket from some material sheet and use it instead of...
  7. migueldiazch

    Coil pressure testing

    According with API 560. Fired Heaters for General Refinery Service, coils shall be hydrostatically tested to a minimum pressure equal to 1,5 times the coil design pressure, but I am confused if this criteria applies just for new Fired Heaters. What would be the criteria for Fired Heaters that...
  8. migueldiazch

    Steam turbine bearing housing repair

    Patricia, The document has 3 pages, see pages 2 and 3. Thank you very much for your help and interest Regards, M.D
  9. migueldiazch

    Steam turbine bearing housing repair

    Hello, I am looking for some advise about how to repair some craks on a cast iron NDE bearing housing next to ball bearing working area. See attached file. Regards. M.D
  10. migueldiazch

    Hot-tap activity

    We are planning to perform a double hot-tap and stopple on 10" pipe SCH STD with AGO as a process fluid from a distillation tower. The pressure for the process is 54 psi and the temperature is 440°F. The hot-tap company asked us for a maximun velocity through the pipe of 4 feet/sec. We have an...
  11. migueldiazch

    Hot-tap activity

    We are planning to perform a double hot-tap and stopple on 10" pipe SCH STD with AGO as a process fluid from a distillation tower. The pressure for the process is 54 psi and the temperature is 440°F. The hot-tap company asked us for a maximun velocity through the pipe of 4 feet/sec. We have an...
  12. migueldiazch

    Potencial Transformer issue

    Hello, I am trying to evaluate the factibility for replacing one Potencial Transformer, reviewing the plate data we found that the only difference between the one that we want to replace and the one that we have available are the Accuracy Burden and the Thermal Rating. Accuracy Burden...
  13. migueldiazch

    Motor stator failure

    Sorry, here is the other file.. M. D.http://files.engineering.com/getfile.aspx?folder=fb850aa6-0201-45fc-8ae9-ce982e969993&file=May2008_Failure.pdf
  14. migueldiazch

    Motor stator failure

    Hello, In May 2008 trying to diagnose a motor for noise, we did a vibration analysis an saw in the spectrums some signs of internal rub. We decided to remove the stator and found the squirrel cage broken (se attachment "May2008 failure") the motor was a GE 591 HP, Model: 5K82094062501, Poles: 2...
  15. migueldiazch

    Minimum retirement pipe thickness

    Thanks, it is time to do the math. Regards Miguel

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