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  • Users: CRL11
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  1. CRL11

    Spherical API-620 Tank Free Body Diagram

    thread809-140665 Hello, I'm tasked with re-rating some API-620 tanks. I would love some clarification in regards to the free body diagram and force (Pg,Pl,W) sign conventions. Can someone show a better sketch than what is already in the code for a sphere that is ground supported and full...
  2. CRL11

    UG-45 Nozzle Thickness on an F&D Head

    All, I have a vessel with an F&D head full of nozzles. COMPRESS is requiring a minimum thickness of 0.337" on an 8" nozzle (limited by UG-45, Tb-1). This nozzle is located in the inner 80% of the F&D, therefore, it's in the spherical portion. The fabricator ordered his materials and has...
  3. CRL11

    Strange Nozzle MAWP Numbers

    I'm reviewing some vendor calculations and I'm seeing some strange MAWP numbers in the pressure summary. The temp is 300ºF and the flange rating should be the MAWP (230 psi at this temp) but COMPRESS is reporting 229.99 psi in the pressure summary. There is no liquid head and you can clearly...

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