The issue of design temperature and design pressure
Thread Content
The device is equipped with one unit operating in Condition 1: design pressure of 2.9 MPA, design temperature of 90 degrees; Condition 2: design pressure of 2.9 MPA, design temperature of -46 degrees; Condition 3: design pressure of FV, design temperature of 90 degrees. Does this FV represent the maximum temperature under vacuum? Now I’m wondering whether, at an operating pressure of 0.3 MPA, it’s possible to increase the operating temperature to 200 degrees?
One must understand the process flow and operations before drawing conclusions; it seems that the conditions are insufficient
FV represents a design pressure that is negative, right? How can FV represent the maximum temperature under vacuum?
FV refers to negative pressure; your third operating condition corresponds to a design pressure of -0.1 Mpa and a design temperature of 90°C. Regarding the operating pressure you mentioned, it is 0.3 MPa, and the operating temperature is 200°C. Generally, a design pressure of 0.48 MPa and an operating temperature of 220°C are adopted. With this temperature and pressure, based on experience, your first and second operating conditions should be sufficient to cover it. However, if you include this in the design requirements, you will need to prepare a separate calculation report.
FV is the abbreviation for Full vacuum; full vacuum means -0.1 Mpa in our terms
List all your process operation conditions in detail and have an analysis and design specialist take a look; it might fall within the scope of analysis and design.
I’m not a designer. What I want to ask is: based on the three operating conditions provided by the designer, when operating at a pressure of 0.3 MPA, can the temperature be increased up to the designed temperature of 90 degrees? It can still be a bit higher.
The temperature can definitely be increased; as for by how much, that’s the question. We have taken into account various factors such as the available effective thickness and so on for the materials. Specific calculations are required.
What material is this device made of? And it depends on what device it is. Nothing can be generalized; the conditions you’ve mentioned are too vague, so it’s impossible for them to give you the correct answer.
You mentioned four operating conditions; for each of these conditions, it is necessary to meet the requirements in order to be able to use it!