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Recent content by Frank Zhang

  1. Frank Zhang

    API 650 5.1.5.7 Shell-to-Bottom Fillet Welds, annular plate more than 13does code allow fillet only

    Dear all Thanks for your reply. I am understanding from your upside reply: It means for this case annular plate greater than 13mm, shell to bottom weld have no choice, only allow Fillet-groove Weld Right? But after reading it’s statement, it has conflict. b) For annular plates with a nominal...
  2. Frank Zhang

    API 650 5.1.5.7 Shell-to-Bottom Fillet Welds, annular plate more than 13does code allow fillet only

    Dear Mr DHURJATI SEN Thank you for your reply. My understanding is for example: If i have a tank, bottom shell thickness is 30mm. annular plate is 20mm. I have two choices to weld the bottom and shell plate together. 1. I weld 20mm fillet weld inner and outer.20=annular thick. 2. I weld 10mm...
  3. Frank Zhang

    API 650 5.1.5.7 Shell-to-Bottom Fillet Welds, annular plate more than 13does code allow fillet only

    5.1.5.7 Shell-to-Bottom Fillet Welds b) For annular plates with a nominal thickness greater than 13 mm (1/2 in.), the attachment welds shall be sized so that either the legs of the fillet welds or the groove depth plus the leg of the fillet for a combined weld is of a size equal to the...
  4. Frank Zhang

    H.Kroon's method

    DEAR HTURKAK & IFRs Thank you for all your reply.[2thumbsup] Regards Frank.
  5. Frank Zhang

    API 650 Tank plumbness and Roundness check points?

    Dear All, For a tank designed as per API 650, Tank dimension is 43m Dia and 30m height. For the plumbness and roundness check, how many point shoud be take? At least 8 points? Does API 650 specify anywhere? thanks you. Regards
  6. Frank Zhang

    H.Kroon's method

    Dear experts In H.Kroon's method. Many people take the first P1 as P: in N unit.take the second P1: in N/mm. but in the book it's all P1 and the value is same all in N/mm. So which one is correct? how to get P1 value in N/mm? Thanks Regards Frank...
  7. Frank Zhang

    API 650-Plumbness Tolerance for one shell

    Dear JStephen, Geoff13 Thank you for all your reply. It really helpful for me.
  8. Frank Zhang

    API 650-Plumbness Tolerance for one shell

    Dear expert, We are constructing a tank with 41.4m diameter. As per API 650 stated: 7.5.2 Plumbness a) The maximum out-of-plumbness of the top of the shell relative to the bottom of the shell shall not exceed 1/200 of the total tank height. The out-of-plumbness in one shell course shall not...

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