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<div><div>Hi All,<br><br></div>I've been having issues getting the
ABSHullCalc spreadsheet to work for me, most of the function macros show
as #MACRO? using Open Office Calc or #NAME? using MS Excel even with
macros enabled. <br><br>So I've been trying to use Procedure 2-2 in the Pressure Vessel Design Manual and having some questions.<br><br>For
a 120" cylinder including heads, 40" diameter with 0.25" thick 516gr70
plate and a Px of 175 psi I'm getting Pa=29.2psi. So, to calculate
required stiffeners to raise Pa I'm trying to use 1.25"x0.25" T rings
with 10" spacing (Ls) and getting I=0.618, As=0.625 giving me Factor "B"
of 1,411 if P in the calculation is 14.7 psi. Now the problem with this
is my Factor "B" is not even shown on Figure 2-1g. Increasing my Ls to
20" gives Factor "B" of 1,568, closer but still short of the lowest
number in the figure of 2,500. In step 10 am I reading it right as
I=(0.16*(Do^3)*Px*Ls)/E ?<br><br></div>Can anyone see what I'm doing wrong here?
<br><br></div>-Eric<br></div>