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Tank Shell Buckling Check for Wind

Tank Shell Buckling Check for Wind

Tank Shell Buckling Check for Wind

(OP)
Line 9 on the standard API 650 datasheet in Appendix L gives the option to "Check buckling in the Corroded Condition".  I would have thought this to be a manditory calculation.  Why is it an option?

Thanks

RE: Tank Shell Buckling Check for Wind

The stiffness of the shell for this kind of buckling depends on the aveage thickness.  A localized thin spot wouldn't significantly affect it.  API is apparently assuming that corrosion is somewhat localized, rather than a uniform loss of metal on the entire tank.  This also enters in on some of the weight calculations, which are not always handled uniformly.

 

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