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  • Users: BZ29
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  1. BZ29

    API 620 Annular plate

    I have gone through API620 in detail and found no requirement for RT of annular plate, annular plate thickness & width calculation unlike API650. I am just curious about the possible reasons, as API620 tanks seems to be more complex.
  2. BZ29

    API 620 high compression area requirement

    Hello experts: I have sometime came across large API 620 tanks having significant design pressure, which requires a very large compression area. i tried using all of the available Compression-ring Juncture options, but still there used to be a big difference. eg. presently i have following tank...
  3. BZ29

    Stiffener Rings

    Received some pressure vessel drawings, having following data ASME Sec VIII Div.2 Dia: 5500mm Lenght: 20200mm Thickness: 14(Shell) / 10(heads) Hemispherical heads supported on 3 saddles. Vessel have internals of more than 20000kg Although design is not in my scope of work, just curious to...
  4. BZ29

    API 650 External Pressure design

    Please correct & guide me if my understanding is wrong regarding these two issues: 1) With Ref to API650 5.2.1(b), upto 0.25kpa external pressure, no calculation is required (safety against such vacuum is inherently built in its internal pressure design). Annex-V is for pressure above 0.25kpa...
  5. BZ29

    How to Support very long Pressure Vessel (Bullets) on two saddles?

    Hi. I have come across design of some horizontal pressure vessels (ASME Sec VIII Div.1/2) that are extremely long. Eg The longest among them is: Diameter: 8m Length T-T: 62m Internal pressure: 38 bar External: Full Vacuum Specific Gravity: 0.51 I am unable...
  6. BZ29

    In API 650 5.12 tank anchorage calculation

    Hi. In API 650 5.12 tank anchorage calculation... for design pressure case, instead of using input design pressure, it uses maximum calculated design pressure from Annex-F. Doing so, causes the anchorage to increase as we increase the compression area (increase in compression area increases...
  7. BZ29

    Vacuum insulated cryogenic vessel internal supports?

    Hi. I need to design a 4m3 transport vacuum cryogenic tank for liquid oxygen. Can someone please guide about the material and type of supports that are typically used in annular space, so that weight and acceleration effects are accounted as well as conduction is also minimized. Any sketch...

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