Sulfur dioxide levels are low in steel chimneys; how should the material be chosen?
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The flue gas contains 10% water and 100 mg/NM3 of sulfur dioxide, at normal pressure and a temperature of 80°C.
Can 316L or 2205 be used?
Agreed; generally, weathering steel combined with glass flake is used – one should not rely on the corrosion resistance of steel to counteract sulfur dioxide. It’s not cost-effective.
The sulfur dioxide content is extremely low; can the use of this material be reduced?
The sulfur dioxide content is relatively low; can this corrosion be ignored?
No, you definitely need to take the content into consideration
Can low-alloy steel be lined with glass flake?
Weathering steel, with the domestic grade Q355NH, is itself a type of low-alloy steel. 304 belongs to high-alloy steel.
Thank you. Can it be used interchangeably with Q345R? I haven’t come into contact with Q355NH before.
ND steel cannot be replaced by another material; it remains ND steel, and Q355NH is still Q355NH – the two are different