I know, but B31.3 say this:
"Severe Cyclic Conditions: conditions applying to specific piping components or joints in which SE computed in accordance with para. 319.4.4 exceeds 0.8SA (as defined in para. 302.3.5), and the equivalent number of cycles (N in para. 302.3.5) exceeds 7000; or other...
We need to check the Severe Cyclic Conditions. I work in WHITE MARTINS, It's a Praxair's Company and we have a standard that say something like that:
Use L6: L1-L2 EXP (DISPLACEMENT STRESS RANGE FOR EXPANSION STRESS CALCULATION) for severe cyclic service, because severe cyclic service requires...
I have the following load cases:
L1: W+D1+T1+P1 OPE ( THE HOT OPERATION LOAD SET )
L2: W+D2+T2+P1 OPE ( THE COLD OPERATION LOAD SET )
L3: W+P1 SUS ( SUSTAIN LOAD )
L4: L1-L3 EXP ( EXPANSION IN HOT OPERATION )
L5: L2-L3 EXP ( EXPANSION IN COLD...
