What metal material should be used for weak sulfuric acid pipelines?
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Help: I need to use weak sulfuric acid here, with a pH value between 2 and 3. What metal material would be suitable for the pipes?
316L is better, it’s just a bit more expensive
Is a metal material necessary? Non-metals such as FRPP, FRP, composite pipes, and lined pipes can also be used, provided that the temperature is not high.
Check out the \"Chemical Process Design Handbook\"
If the temperature is not high, FRPP, FRP, composite pipes, and lined pipes
Weak sulfuric acid, with a pH value between 2 and 3; if the temperature is high (>100), metal pipes should still be used, but 316L is not necessary – 304 will suffice. Sulfuric acid is not hydrochloric acid! :)
Thank you all. We chose 316L pipes, with a temperature of around 90 degrees. We were worried that they might not work, but it seems they should be fine
Our company’s sulfuric acid concentration is around 5%, and the temperature is 80 degrees; 316L material fails after just over a year under such conditions. I’m curious about the concentration of sulfuric acid in your case
For resistance to weak acids, 316L should be used; if corrosion occurs, it may be due to the presence of other impurities
Our company uses stainless steel pipes with an outer diameter of 159; they won’t break down for many years, so they’re reliable to use. The material is 1 chromium, 18 nickel, and 9 titanium
At this temperature, it’s no problem to use PP eardrums; our company uses them
Do we have to use metal? Over time, nothing is immune to corrosion; FRPP and FRP are still the better choices
Let’s learn it~~~
The 6MO alloy should work in this environment. If a metal material is required, some hanging specimen tests can be conducted.