B31.1 pipe stress loadcases offshore FPU

[JamRanch]

what is a better loadcase set for a marine system pipe manifold in a floating production unit with worst accelerations and displacements imposed by the hull structure by 100yr storm. Pressure (P) 150psi, Fluid Temperature range (70F +/-10):
1 W(incl pipe, fluid, insul)(SUSTAINED)
2 P(SUS)
3 W + P(SUS)
4 W + P + D(SUS)
5 D(OPERATING)
6 A(OPE)
7 W+P+D+A (EXPANSION)
8 (W+P+D)-(W+P)(EXP)

 

[RVAmeche]

This would probably be better suited to the Caesar II (or whichever software you're using) forum, but it's pretty dead.

At a minimum I think you'd apply the displacements/accelerations of a storm to your general operating case (unless you assume the facility will be shutdown in advance), and the case 1 or whichever your "not operating" case is, assuming the facility has been evacuated.

Not sure the scope of your system, but if there's any above water piping in your scope as well, you should include the wind associated with the event as well.

Is your min/max temperature really 60-80F?

 

[JamRanch]

The piping is inside the hull and ~30m below waterline where the water temp is influences the compartment and piping. Air temp inside hull is also a factor as it is ventilated with outside air. I will revisit Temp range with the one who reduced it. Should i delete this post since it is the wrong category (not Caesar II)? Maybe linkedin Caesar II group is a better option.

The vessel will be shut down during the storm. P of 150psi is not the issue. Displacements ... we are also running dry tow cases without pressure.
Thank you RVAmeche.

 

[RVAmeche]

There isn't a general pipe stress forum or other forum for CAEpipe or whatever you may be using, so I'd probably just leave it here.