I am in the same case but with an GSU :
You will have to review all the documentation with more detail.
Cause and Effect charts
Utilities consumption calculation
Instruments list
Alarm and trip setting list
Potentially plot plan conception (with specialist engineer)
Potentially technical...
I am performing the depressuring calculation of an amine absorber (HP) in order to determine the minimum design temperature of the vessel and therfore to confirm the material selection.
I am using the Depres Unit of PRO II software. I have already size the BDV orifice size for the fire case...
