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  1. DriveMeNuts

    l

    Are you asking about short three day courses so you can be employed as a Pressure Vessels Engineer, or are you interested in doing a research PhD? Either way I can't help you, other than Strathclyde Uni in the UK which has researchers and short courses in the discipline.
  2. DriveMeNuts

    UG-34(d)(10) Factor of Safety definition?

    For flat heads, I am wondering what the definition of "factor of safety" is for UG-34(d)(10). Does the mechanical locking mechanism need to be calculated of proof tested to fail at 4 times its design loading? Or does the margin on yield for the mechanical locking mechanism need to be changed...
  3. DriveMeNuts

    Stress linearisation is not required when there is no peak stress

    When a vessel shell has a bracket welded to its outside surface which has an external load applied to it, there are membrane, bending and peak stresses on the outside surface of the vessel shell, local to the bracket. Linearization is required to establish the linearized Membrane plus Bending...
  4. DriveMeNuts

    ASME B31.3 elongation strains

    ASME VIII Div 1 Paragraph UG-79 has cold forming fiber elongation limits and corresponding equations in Table UG-79-1 to calculate fiber elongation strains. ASME B31.3 only has the limits with no equations. Does anyone know where the equations are in ASME B31.3? I'm sure I saw them in B31.3...
  5. DriveMeNuts

    Do you need to calculate linearized equivilant stress on oposite side where there is no peak stress?

    A pad is welded to the outside of a shell. The pad has external loading applied to it. I am trying to correctly find the membrane and bending stresses in the shell at the edge of the pad. My understanding is that the purpose of Linearization is to remove the peak stress so that membrane and...
  6. DriveMeNuts

    Weld Joint Efficiency for Loading on Nozzle

    I'm wondering if anyone has heard of progress on whether a joint efficiency needs to be applied to the shell-nozzle junction weld when conducting a WRC 107 assessment? I ask because an AI is insisting that a joint efficiency be used even though decades of industry experience has demonstrated...
  7. DriveMeNuts

    Primary or Secondary Stress?

    If an attachment to a vessel has a sustained "load controlled" gravity type load that causes Pl+Pb in the shell to be just below Yield then plastic collapse will not occur and therefore this is acceptable. (Say this sustained load causes a deflection of the attachment from zero to 5mm.) If the...
  8. DriveMeNuts

    Circular pad welded to shell

    Hello, In ANSYS design modeller, I am trying to model a circular pad onto the surface of a cylindrical shell, like a nozzle reinforcing pad. Does anyone have any tips on how to do this accurately? The best I can come up with is to create a square pad and then radius the four corners. It is...

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