Design pressure: 4.4/F.V. What does F.V. mean?

2009-08-03View Original

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On a certain pressure vessel drawing: Design pressure: 4.4/F.V. What does F.V. mean?

Reply #22009-08-03

I learned it a few days ago: full vacuum! Complete vacuum! 1# gdxf

Reply #32009-08-03

Same solution, full vacuum. That is, the absolute pressure is 0 KPa.

Reply #42009-08-03

FV means vacuum. That is, 0.1MPa

Reply #52009-08-03

Negative pressure; the design pressure is set at -0.1 Mpa

Reply #62009-08-03

This means that negative pressure may occur, possibly during tank inversion or maintenance.

Reply #72009-08-05

Full vacuum means an absolute pressure of 0; many of the storage tanks involved in a project we are working on require this condition.

Reply #82014-05-26

Is -0.1 used in the strength calculation?

Reply #92014-05-26

So, what does that whole thing actually mean? 4.4 Vacuum level?

Reply #102014-05-26

I don’t think so; personally, I believe the positive pressure is 4.4 MPa, while it also has to withstand a negative pressure of -0.1 MPa.

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Design pressure: 4.4/F.V. What does F.V. mean?

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