Questions about design pressure
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There is now a reaction vessel with a liquid medium; it has a jacket, and the medium alternates between steam and cooling water. During the reaction, the pressure inside the reactor is at atmospheric pressure, while the jacket is supplied with 0.1 MPAG of steam. After the reaction is complete, the jacket is switched to cooling water, and the reaction vessel is evacuated to approximately -0.05 MPAG. How is the design pressure of this reactor determined? Seeking help from experts!
What is the cooling water pressure of the jacket? If the cooling water temperature is not higher than 0.15, the reactor can be designed with a pressure of 0.2/FV and a jacket pressure of 0.2 MPa.
Is this reactor lined with glass-lined steel or made of stainless steel? For glass-lined vessels, the mechanical seal pressure is generally used for the shell side, while 0.6 MPa is used for the jacket side.
The design pressure for glass-lined reactors is not determined based on the sealing pressure of mechanical seals, right? On the contrary, the sealing pressure of mechanical seals must be at least equal to the design pressure, which in turn is determined based on the operating pressure
The design pressure inside the kettle is set at -0.1 MPa; the design pressure inside the jacket cannot be determined yet as the operating pressure of the cooling water is unknown
If the cooling water temperature is not higher than 0.15, what is the basis for this value you have chosen? Could you give some advice?
Should the design pressure of the external pressure of the reactor and that of the internal pressure of the jacket be the same?
The cooling water pressure is 0.4 MPAG
For the two operating conditions, it is necessary to determine whether they represent alternating loads, and design in accordance with JB4732. Two operating conditions: First condition: design pressure of the container is 0.05, and the design pressure of the jacket is 0.2 ； Second operating condition: container design pressure of -0.1, jacket design pressure of 0.44 ； As can be seen from the above data, the wall thickness of the equipment is determined by the second operating condition.
The design pressure is determined based on the maximum pressure under operating conditions