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jph1022
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Join Date: May 2009
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Minimum Shell Thickness - ASMR Section VIII, Division 2

05/13/2009 11:03 AM

I am trying to find the minimum thickness for the cylindrical shell as given in section 4.3.3.1 of ASME Section VIII division 2 2007 edition.

The formula given is

t=D/2(exp[P/SE]-1)

My question is the formula makes sense as it rhymes PD/2t except the "exp" part. I am assuming "exp" means exponential here. Am I reading this right.

Any clarification is greatly appreciated.

Thanks
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Quobaldt
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#1

Re: Minimum Shell Thickness - ASMR Section VIII, Division 2

05/13/2009 11:32 AM

Did you e-mail the ASME guys on their website yet?

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XMech
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#2

Re: Minimum Shell Thickness - ASMR Section VIII, Division 2

05/13/2009 11:46 AM

"exp" is the exponent/power of the natural number 'e'

exp[x] = ex

http://en.wikipedia.org/wiki/Exponential_function

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#3

Re: Minimum Shell Thickness - ASMR Section VIII, Division 2

05/13/2009 9:52 PM

Yes, "exp" means exponential as Mr. XMech said.

exp[x] = ex = 2.718281828x

Or you can simply write down the formula on your MS Excel. The formula is "=exp(x)" (without punctuation mark)

Hopefully helpful..

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