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Recent content by osers

  1. osers

    API 653 New Tank Bottom NDE requirements

    Hello All, API 653 9.10.2.4 states: "Installation of a new tank bottom, after removal of the existing tank bottom, shall meet all requirements of API 650". That is exactly my case, I have an old tank whose tank bottom is being replaced. Questions: 1. All the NDE required by API 650 apply in...
  2. osers

    Minimum Thickness Calculation for Riveted Tank Shell

    fegenbush, Thank you very much for your answer, now everything is clear.
  3. osers

    Minimum Thickness Calculation for Riveted Tank Shell

    Thank you very much JStephen, now I think things are more clear to me, the sketch you attached helped me so much. But I still have a doubt: that mean that for riveted thanks I have to calculate 2 minimum thicknesses, one for the locations within the 6 in. of rivets using E according Table 4.3...
  4. osers

    Minimum Thickness Calculation for Riveted Tank Shell

    Hello all, could anybody explain the API 653 paragraph 4.3.4.1: "E is 1.0 for shell plate 6 in. or more away from rivets. See Table 4.3 for joint efficiencies for locations within 6 in. of rivets.". What does it mean the 6 in. away from rivets?. If possible, please attach a sketch to the answer.
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