Design of Vessel at Atmospheric Pressure
Design of Vessel at Atmospheric Pressure
(OP)
Hi,
I got a vessel, which the design pressure is even lower than atmospheric (around 0.035MPaG). The vessel design temperature on the other hand is at 300 degC and wrapped with a half-pipe jacket of 0.7 MPaG. Should I design the vessel at atmospheric pressure instead of 0.035 MPag? The reason for saying this would be that some of the manufactures, when we issue purchase order they quoted the design pressure of the vessel to be Full Water + 3 barg, sometimes Vacuum + 3 barg.
I got a vessel, which the design pressure is even lower than atmospheric (around 0.035MPaG). The vessel design temperature on the other hand is at 300 degC and wrapped with a half-pipe jacket of 0.7 MPaG. Should I design the vessel at atmospheric pressure instead of 0.035 MPag? The reason for saying this would be that some of the manufactures, when we issue purchase order they quoted the design pressure of the vessel to be Full Water + 3 barg, sometimes Vacuum + 3 barg.





RE: Design of Vessel at Atmospheric Pressure
If the 'g' is a mistake, and you mean MPa absolute, then this is a partial vacuum and it would be normal that the vessel is designed for vacuum.
Concerning the manufacturers, you should ask them why they quoted what they quoted. And normally it is up to you, the purchaser, to state the design conditions.
prex
http://www.xcalcs.com : Online engineering calculations
http://www.megamag.it : Magnetic brakes and launchers for fun rides
http://www.levitans.com : Air bearing pads
RE: Design of Vessel at Atmospheric Pressure