Selection of high temperature pipe materials
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Dear sea friends: Hello everyone, I am working on a project recently. The working conditions involved are high temperature and negative pressure, the working temperature is 750 degrees, and the working pressure is 20KPa (A). I plan to use stainless steel pipes. I would like to ask all my friends what kind of material should be used for my working conditions.
321 1Cr18Ni9Ti or 309s 0Cr23Ni13, 310s 0Cr25Ni20 (the latter two are more expensive), 321 is more suitable for your needs. It has added titanium element, and its high temperature resistance and corrosion resistance are much better than 304. The high temperature resistance can reach more than 800 degrees, while 304 is only 400 degrees. It’s more cost-effective than 309s and 310s.
Thank you for the answer upstairs, thank you very much!
You can also use 317L and 347 or 410, if not, use alloy steel. However, I have a question for the poster. Such a high temperature must be inside the furnace system. How to ensure the sealing of the pipe flange connection? What gasket to use?
Material selection is a matter of knowledge. You'd better tell me what medium is being transported, and consider the pressure, temperature, price, material performance, etc. for comprehensive selection.
Thank you everyone upstairs, the main media* Hot steam and hydrocarbons
For high temperatures, it is better to use 321