Caesar II appears to use three methods to asses flange leakage (see below). Where can I find reference literature for the “Flange Flexibility Model” method? (I could not locate it in help files.) Is it a Caesar II proprietary method? I am looking for things like description, theory, formulae, and definition of variables.
Thank you,
Mike
- Equivalent pressure:
EQUIVALENT PRESSURE MODEL ----------------------------
Equivalent Pressure ( KPa ) ............ 6832.00
ANSI B16.5 Flange Allowable Pressure Rating . 1507.19
STRESS SAFETY FACTOR: (If less than one then joint
failure is predicted.) (Allowed/Actual)
ANSI B16.5/Equivalent Pressure ................. 0.22
- SAME Sect VIII Div 1:
ASME SECT VIII DIV 1 STRESS MODEL ------------------------
ACCORDING TO A05 APP 2-14, THE FOLLOWING RIGIDITY
FACTORS SHOULD BE LESS THAN 1.0
ASME Rigidity Factor "J", Operating Case ....... 0.1735
ASME Rigidity Factor "J", Seating Case ......... 0.1776
- Flange Flexibility Model:
FLANGE FLEXIBILITY MODEL ---------------------------------
BOLTED FLANGE CHARACTERISTICS:
Initial Tightening Stress in the Bolt (Not the seating
stress): 392456 KPa
Approximate Torque required to induce the above initial
stress: 122 N.m.
GASKET COMPRESSION: COMPRESSION
(mm.)
After Initial Boltup (Ci)........... 0.1885323375
Loss-of due to Pressure (Cp)........ 0.0009138390
Loss-of due to Applied Moment (Cm).. 0.0171828177
Loss-of due to Applied Force (Cf)... 0.0000000000
Loss-of due to all loads (CL)....... 0.0180966575
Initial minus all Losses (Ci-CL).... 0.1704356819
For Leak-Proof Joint (Creq)......... 0.0030537494
Excess available (Ci-Creq) ......... 0.1854785979
LEAKAGE SAFETY FACTOR: (If less than one then joint
leakage is predicted.) (Allowed/Actual)
Pressure Only (Ci-Creq)/Cp ............. 202.97
Force Only (Ci-Creq)/Cf ................ 99999.00
Moment Only (Ci-Creq)/Cm ............... 10.79
Pressure+Force+Moment (Ci-Creq)/CL ..... 10.25
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