Flange Leakage Checking in Caesar II Using ASME Section VIII Method

Flange Leakage checking in Caesar II using ASME Section VIII method •

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After performing static analysis click the “Analysis” and then click “Flanges” in CAESAR II as shown below.

ro!ide a "le name and select the proper Flange #ype in the section as mentioned in the $S. Inp%t the &ange parameters as shown below'

ress the key “Ctrl(F” to select the concerning Si)e and Rating. Few data will a%tomatically "lled from Caesar II database. *owe!er it is good practise to con"rm the data from go!erning code.

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Flange Class is the &ange press%re rating and is re+%ired for checking ,# Rating of E+%i!alent ress%re. Flange -rade' Select $aterial -ro%p o. as per AS$E / 01.2 #able 0A list of material speci"cation. Following table can be %sed as reference'

Refer to the applicable &ange code AS$E 01.2 or AS$E / 01.34 and %pdate a%tomatically "lled &ange data. #ake special care while inp%ting for 5Small End *%b #hickness67 58arge End *%b  #hickness6. 5Small End *%b #hickness 6 m%st be e+%al to the ipe  #hickness. 8arge End *%b #hickness m%st be e+%al to 9:,/; where : is *%b ,tf; where > is length thro%gh *%b and tf is &ange thickness. ow it is the t%rn to enter the /olts and gasket parameters. #ake parameters from AS$E / 01.?@ or AS$E / 01.?0 as shown below'

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Check /olt Circle
For Eecti!e -asket $od%l%s press Shift(D ey and then follow “*igh End” in *elp statement. 8eak ress%re Ratio m -asket Seating Stress y shall be in accordance with AS$E SEC#I GIII
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For %bbin Hidth in the right side 8ea!e blank for Helding eck  #ype and inp%t Ring Boint width as per the ring no. as described on AS$E / 01.?@ #able  #>E R RI- -ASE#
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ow inp%t the material data as shown below'

Select the material of Flange and bolt and Inp%t design temperat%re. Flange Allowable 7 /olt Allowable at design and ambient temp can be taken from CAESAR II database for partic%lar &ange and bolt material.

Flange $od%l%s of Elasticity shall be taken from table C,1 of AS$E /, 0..which is gi!en in millions of psi con!ert it to consistent %nit •

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Kse 0.@ for Flange Allowable Stress $%ltiplier and ?.@ for /olt Allowable Stress $%ltiplier. Kse proBect speci"c data if a!ailable. ow Inp%t
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ow r%n the analysis to st%dy the o%tp%t res%lts. ormally If safety Factor is less than one then Boint fail%re is predicted and in o%tp%t this is shown by a M mark.

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If res%lt shows fail%re then try to red%ce the bending moment or aLial force and reanalyse. If that is not possible check if the &ange rating can be increased.