Selection of hydrogen fluoride-resistant materials
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There is a process pipeline containing hydrogen fluoride in gaseous form, with a pressure of 1.5 Mpa and a temperature of 300°C, which requires a valve for control; a ball valve is intended to be used for this purpose. It is necessary to determine what corrosion-resistant material should be chosen. I would be extremely grateful if the expert could give me some guidance!
Grade 400 alloy or Hastelloy G can be used, but it is uncertain whether they will still maintain good corrosion resistance at 300 degrees Celsius.
If it is gaseous anhydrous AHF, 316L will work, but if there is moisture present, I think few materials can withstand it over a long period of time.
For safety reasons, I recommend using Hastelloy material. Our company has just installed a distillation unit that contains HF, and the control valves used in it are made of Hastelloy.
I think 316L is sufficient for the pipes, while Hastelloy should be used for the control valves, as they are moving components that need to be opened and closed frequently; therefore, materials that are resistant to corrosion and wear are required
Whether it contains moisture is key; please let me know the content level, as I’m very interested in this. It can also be sent to my email: lgl@ti-fan.cn Thank you.