Material of control valve for sulfuric acid project
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The company plans to build a new sulfuric acid production facility. As this is our first time dealing with such projects, we would appreciate it if those of you who are familiar with these types of installations could explain the control valves that require special attention. Specifically, we are interested in knowing their location, the type of medium they handle, the material of the valve body, the material of the internal components, as well as any special treatment methods or materials required. Thank you in advance to all the experts!
New sulfuric acid project? The electronic-grade sulfuric acid project?
What is the sulfuric acid concentration? Fluorinated-lined valves are used for dilute sulfuric acid. 98% concentrated sulfuric acid – carbon steel is sufficient. For reference only.
I have some information on this; the original poster can send it to you privately for reference
Below 120 degrees, four-fluoride valves work for both thin and thick fluids. For concentrated acids below 230 degrees, high-silicon valves can be used; for high-temperature concentrated acids, alloy valve type 20 can also be utilized
98% concentrated sulfuric acid. But dilute acids will definitely be present in the system.
For ALLOY20, the use of fluorine-lined materials is related to pressure; check the standards for fluorine-lined valves. . It is prone to leaking under high pressure
The temperature, pressure, and concentration of sulfuric acid need to be provided.
The sulfuric acid production process inevitably involves SOx gases, and the material of valves used in different stages certainly varies. It depends on the specific process – whether it involves sulfur or sulfur concentrate – but generally there are many different materials involved: WCB, WC6, WC9, as well as those lined with fluorine; in some cases, 310S is even used. These processes are well-established, so simply ask the design institute for the relevant specifications