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  1. TarikY

    Vortex Breakers in API 650 Tanks

    How much product should there be above a vortex breaker to ensure vortices do not form in a pump suction line? There are lot of calculations and thumbrules out there for volume needed above an internal pipe in order to avoid using a vortex breaker, but I don't see any guidance if there is...
  2. TarikY

    API 650 - Can I omit a hydrotest?

    In lieu of a hydrotest per 7.3.6 of API 650, can other inpections/NDE be performed to verify integrity of the tank construction?
  3. TarikY

    API 650 Tank Settlement Allowances

    Do API 650 tanks have center-to-edge settlement allowances following erection/hydrotest? In API 650 I have found the following: 1) 7.5.2 Plumbness: 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. 2)...
  4. TarikY

    API 650- 1-ft Design Method vs. Variable Design Point Method

    For API 650 tank shell thickness calculation, what are the reasons why someone would use the 1-ft Design Method over the Variable Design Point Method? I know that API 650 5.6.3.1 states that the 1-ft method shall not be used for tanks larger than 61 m (200ft) in diameter. If I have a 50 ft...

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