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Table 5.5: Factored Load Combination for Bulk Material. ASME VIII Div 2

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Doodler3D

Doodler3D

Mechanical
Jan 20, 2020
188
Hi,

For a mixing vessel, how would the design margin of 2.4 be applied to the static load from a bulk material? The powder weight results in a nonlinear distribution of wall stress due to cohesive forces and wall friction. These distributions were calculated from Jansson/Jenike theory since the hydrostatic assumption is too conservative. Is it appropriate to apply the design margin directly to the material bulk density?

Thank you

Hydrostatic_xa9dvo.png
 
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The Code does not specify how you apply Ps, just that you do. In your case, it would be comprised of a normal and tangential load/pressure/traction. You would then factor that by Beta, as indicated in Table 5.5.

Your approach appears to be reasonable.
 
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