Leclerc
Chemical
- Aug 22, 2002
- 73
[I have posted this in the API Codes Forum a few days ago, but no bites, yet]
As I understand, within the vessel Codes there is an allowable accumulation ( say 10%) which may be applied to design pressure/ MAWP. Also, where relief valve set pressure is set at this design pressure/ MAWP and there is overpressure of, say, 110% of set pressure, the valve relieving pressure is at the vessel allowable accumulation pressure.
Now to temperature:
For a system where vessel contents have a temperature coincident with pressure at the bubble point;
What should the vessel design temperature be? Should it be the bubble point at the design pressure/ MAWP, or should it be the bubble point at relieving pressure ?
As I understand, within the vessel Codes there is an allowable accumulation ( say 10%) which may be applied to design pressure/ MAWP. Also, where relief valve set pressure is set at this design pressure/ MAWP and there is overpressure of, say, 110% of set pressure, the valve relieving pressure is at the vessel allowable accumulation pressure.
Now to temperature:
For a system where vessel contents have a temperature coincident with pressure at the bubble point;
What should the vessel design temperature be? Should it be the bubble point at the design pressure/ MAWP, or should it be the bubble point at relieving pressure ?