Select pipe flange pressure class
Thread Content
There is a device with a design temperature of 200°C, an operating pressure of 0.8 MPa, and a design pressure of 1.4 MPa. When selecting flanges, the 20II forged part with PN16 has a maximum allowable operating pressure of 12.6 bar at 200°C. If compared to work stress, it can be used ； If compared to the design pressure, it is not available. May I ask, how should I choose?
Choose a higher grade or switch to another material
It should be selected based on the design pressure; if the drawings specify the maximum allowable operating pressure, then that value should be used.
It is recommended to select according to the design pressure......
It is recommended to upgrade the grade and select materials based on the design pressure
Why is the design pressure set so high? Generally 1.1 times the working pressure
The customer specified it, requiring the design to be done at this pressure level
It was specified by the customer, so it needs to be designed according to this pressure
Then you’ll need to convince the client yourself that it can’t be used; otherwise, you’ll have to do the calculations yourself.