I would like to ask how to choose a pipeline material that is resistant to corrosion at high temperatures of 500 degrees
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Recycling of high-temperature waste steam from gas power plants: I would like to ask about such high-temperature streams, which mainly contain sulfur and nitrogen oxides, with an exhaust gas temperature of 500 degrees℃
Careful consideration must be given to this material choice. . . The petrochemical industry claims it is powerless to do anything
Replace Q345R only when it’s damaged!
Is the entire petrochemical industry powerless?
You’re reporting this to the client or management in this way; presumably you don’t want to continue working either
The impurities you mentioned, sulfur and nitrogen oxides, are not easy to define; it depends on the degree of corrosivity. A temperature of 500 degrees is not a problem; 1Cr5Mo should work, as well as 316H. Linered tubes can also be considered. The person upstairs said carbon steel, and it really is feasible; P
This is definitely based on experience! Even if you can find the right materials, the price will scare off the client! In that case, it’s better to use Q345R. The current trend in China’s chemical industry is high temperature, high pressure, and high corrosion. But the supporting materials cannot keep up. Yes, it is also because the price is too high. Like Monel and such. So, low cost, high conversion rate. It’s also an option. Furthermore, if low-cost materials can suffice for a long maintenance period, this option can certainly be considered.