Copy Of Hemispherical Calcu.

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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

1

<- 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

www.parstechnic.com

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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1

07/03/2009

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