Hello Everyone,

According to ASME B31.3 Para 319.2.3, we have to take care about this Displacement Stress Range.
So I have this System with 2 Pumps running together with Scenario like this:

T1= Pump A & Pump B running together
T2= Pump A ON & Pump B OFF
T3= Pump A OFF & Pump B ON
T4= Pump A & B OFF

The Design Temperature= -39/45 deg C and Temperature Ambient= -39/39 deg C

Several of my Load case are:

Case 2= W+T1+P1 (OPE)
Case 3= W+T2+P2 (OPE)
Case 4= W+T3+P3 (OPE)
Case 5= W+T4+P1 (OPE)

So My question is How i Supposed to set the Load Case for Displacement Stress Range for this system?
Can i set them like this:

Case 59= L2-L3 (EXP)
Case 60= L2-L4 (EXP)
Case 61= L2-L5 (EXP)
Case 62= L3-L4 (EXP)
Case 63= L3-L5 (EXP)
Case 64= L4-L5 (EXP)

SO Please correct me if i'm wrong......


Regards

Tengku Syahdilan

No one is correcting you.

But such rigor could be inefficient.

Ok then if No one is Correcting me, then i assumed that i have do the right thing like Code 31.3 Para.319.2.3b stated, and according to Mr. Richard Ay in COADE Newsletter July 03 " Satisfying Expnsion Load Case Requirement" page 11-12.

Better too thorough than not enough, if the worse thing anybody says about you is "he was damned thorough" I would say you have done some good work.

Thanks Sir John & Thanks too for the CODE Interpretation, it is very2 usefull......