Pressure 400 kilograms, temperature 185 degrees, what standard should be used for the flanges?
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For a medium of ammonia, nitrogen, and hydrogen mixture, with a pressure of 400 kilograms and a temperature of 185 degrees, what standard should be used for the flanges? Are there special high-pressure standards, or are it the ammonia synthesis standards?
Refer to the Changfan standard GB/T9124, the table of flange temperature and pressure ratings in Volume 2 of the Fourth Edition of the Chemical Process Design Manual
The last edit to this post was made by Valve Engineer on 2020-6-1 at 21:40; regarding the connection method, welding is recommended as it is a more reliable option； 2. Use flange RTJ; RTJ refers to a metal ring connection for sealing, suitable for high-pressure applications. The maximum pressure rating of RTJ is 42.0 Mpa; it is recommended to refer to the ASME material temperature rating table, as the pressure-bearing capacity of the material decreases under the influence of temperature. 3. It is recommended to use special materials for custom-made valves. Or a carbon steel valve body, with Inconel 600 or Inconel 625 clad inside the valve body and its internal components, which is a more cost-effective option.
HG20615 maximum nominal pressure 420 https://bbs.hcbbs.com/thread-2959259-1-1.html
I agree with you; more participation in the discussion is welcome. For example, what’s your opinion on this post: Is it really necessary to use stainless steel bolts for stainless steel flanges? ? ? https://bbs.hcbbs.com/thread-3017213-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum Website)