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  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

    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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