Could you please tell me how the maximum working pressure and maximum working temperature are obtained?
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This post was last edited by ilvy on 2010-7-9 14:07. Could you please tell me how the maximum working pressure and maximum working temperature are obtained? Is it calculated? still. . . . . . The operating pressure and operating temperature should be filled in the equipment table. Maximum operating temperature and maximum operating pressure. The maximum temperature and pressure cannot be filled in, which is very distressing!
The maximum working pressure and maximum working temperature are empirical values. On the basis of the design pressure and temperature, consider the maximum working pressure and working temperature that will occur under extreme working conditions. This is an issue considered from a process perspective, not simply from the perspective of equipment.
To be more specific,,,,,,,,,,,,
It is based on the pressure and temperature required by your process, and then multiplied by an amplification factor.
The maximum operating temperature and pressure of the process are provided by the process engineer. The main basis is* The maximum value of the operations that may occur during the process. This * It's a technical thing. If it's the maximum operating performance of the equipment itself, then you need to read the manual for the equipment.
There is a concept of operational flexibility. For example, the air volume is 1Nm3/h when designed, and it may be 0.81Nm3/h or 1.21Nm3/h during operation. For different loads, the temperature and pressure may be different. Calculate the limit values, add operational factors and system fluctuations, and finally select the maximum temperature and maximum pressure.
Are there any standards or regulations for specific coefficients? Do you usually come by experience?
Just go by experience, but not everyone has a lot of experience.
For relevant concepts and principles, please refer to the relevant content in HG/T 20570 Process System Technical Regulations. The specific value coefficient is an empirical value, so the process engineer is required to propose it and the process system engineer is required to balance it.
Reply 3# ilvy Process engineers generally simulate different working conditions based on chemical engineering simulation software, such as ASPEN, PRO II, etc. During the simulation process, severe working conditions will be simulated. For the maximum working pressure and temperature of the equipment, you can ask the process engineer in terms of equipment design. There is another way. For example, the maximum working pressure can be measured by the bursting pressure of the bursting disc on the system PID. No matter how high the operating pressure of the equipment is, it cannot be higher than the bursting pressure. Correspondingly, for example, on the steam side of the reboiler, we can look at the maximum saturated steam pressure of the system and the possible pressure that causes the maximum boiling point of the medium, so that the maximum operating temperature can be derived. There are actually many ways. . . Study slowly