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  1. SBQman

    Stress relieved on API 650 tanks after shell course erection

    Hi Stephen, Thanks for your reply. Yes I know that is skipped, and PWHT is required. I am seeking for the better solution, since our subcontractor mess up the activity because of scope change. Even if we plan to perform PWHT on erected shell course, bottom Bitucell layer will get damage. The...
  2. SBQman

    Stress relieved on API 650 tanks after shell course erection

    As per API 650, 5.7.4.3 When the shell material is Group IV, IVA, V, or VI, all opening connections requiring reinforcement in a shell plate or thickened insert plate more than 13 mm (1/2 in.) thick shall be prefabricated into the shell plate or thickened insert plate, and the prefabricated...

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