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Stiffening Rings for pressure vessels

  1. Feb 25, 2014 #1


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    To guard against buckling modes I know that circumferential stiffeners can strengthen a cylindrical vessel against external pressure / internal vacuum.

    Question: Stiffer rings do not contribute anything to protect vessel against internal pressure, correct? I think not, based on Stress eqs. and my understanding. But just wanted to verify my understanding.
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  3. Feb 25, 2014 #2


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    As a general rule, structures buckle because the stress field has at least one principal stress in compression not in tension, so you don't need any "protection" against buckling for a vessel with internal pressure.

    Stiffening rings may be useful design features on a pressure vessel for other reasons, of course - for example to "spread" the local stresses at mounting points, pipe connections, etc.
    Last edited: Feb 25, 2014
  4. Feb 26, 2014 #3


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    Thanks! That makes sense.
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