What does "FV" mean in design pressure?
What does "FV" mean in design pressure?
(OP)
Could anybody explain the meaning of "4.5 MPa/FV" in detail? Thanks a lot.
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What does "FV" mean in design pressure?
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What does "FV" mean in design pressure?What does "FV" mean in design pressure?(OP)
Could anybody explain the meaning of "4.5 MPa/FV" in detail? Thanks a lot.
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RE: What does "FV" mean in design pressure?
RE: What does "FV" mean in design pressure?
-jehan
RE: What does "FV" mean in design pressure?
full vacuum (FV) — a condition where the internal absolute pressure is 0 psi (0 KPa) and the external absolute pressure on the vessel is 15 psi (100 KPa) (see UG-116)
There's also an interpretation which deals with this, presumably prior to the definition being added to App 3.
jt
RE: What does "FV" mean in design pressure?
Mostly 0.8 bara was sufficient.
I didn't get that.
When calculated there was a huge wallthickness for that vessels.
Where they wrong with asking for FV?
RE: What does "FV" mean in design pressure?
As for the higher internal pressure vessels (such as 4.5 MPa), the full vacuum design condition is probably covered by the more onerous internal design pressure, hence it wouldn't make any difference to the shell thickness (obviously, subject also of vessel ID).
gr2vessels
RE: What does "FV" mean in design pressure?
RE: What does "FV" mean in design pressure?
Undesired vacuum conditions may occur in vessels for working conditions such as steam generator / steam accumulator or steam heated tank / heat exchanger etc. or in accumulator of highly volatile liquid or for liquid under low vapor pressure conditions.
Condensation will take place during shut down or due to change in temperature. Vacuum is expected if for any reason you vessel is not vented properly (undersized or blocked vent, or even stop valve that by a foolish design or maintenance was installed on vent pipe), or in case your vessel contains dangerous substance that you are not able to vent.