Prepaired uby:www.parstechnic.com
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Hemispherical Head ver 1.1 Prepared By Pars Technic Co.
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ASME Code VIII Div I 2001 no addenda
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Verification Calculation #1
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ASME L-1.5.1
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<- vessel <- Component
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Dimensions: 0.000 <- Outside Diameter (in.) 0.000 <- Thickness Before Forming 0.000 <- Thickness After Forming 0.125 <- Corrosion Allowance
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In s id e R a d iu s
In s id e P r e s s u r iz e d
(in.) (in.) (in.)
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T h ic k
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Material Properties:
OD
A 516-70 <- Material 1.0 <- Design Pressure(psig) 20,000 <- Allowable Stress Level (psi) 0.70 <- Efficiency (UW-12(d))
0.0 <- Approximate blank diameter (in.) 0.0 <- Approximate weight for steel (lb.) 0.00 <- Volume (cuft)
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Required Wall Thickness and Maximum Working Pressure
UG-32 (f)
-0.125 <- t (Nominal Thickness = Thickness after forming - Corrosion) 0.13 <- L (Inside Radius) (in.)
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(in.)
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PL tMin = ---------------2SE - 0.2P
1 * 0.125 = ---------------------------------------------2 * 20000 * 0.7 - 0.2 * 1
t = 0.000 ERROR
(in.)
2SEt PMax = ---------------L + 0.2t
2 * 20000 * 0.7 * -0.125 = ---------------------------------------------0.125 + 0.2 * -0.125
PMax = ERROR
(psi)
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-35000
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Head stress relief [UCS-79 (d) - carbon and low alloy steel only] Yes <- Head is cold formed(Yes/no) #DIV/0! <- Fiber elongation (see below) Required no <- Vessel carries lethal substances(Yes/no) no no <- Impact testing is required (Yes/no) no no <- Formed between 250 and 900 Degrees F no #DIV/0! <- Greater than 10% reduction in thickness #DIV/0! no <- Head is greater than 5/8" thick before forming no Stress Relieve ?
#DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0!
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fiber elongation calculation UCS-79 (5) 0 <- Rf (Final center line radius, use radius) 0 <- Thickness ### <- Ro (Initial center line radius = Infinity, start with a flat plate)
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elongation =
((75*t)/Rf)*(1-Rf/Ro)= ((75 * 0) / 0) * 1
= #DIV/0!
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07/03/2009