09CrCuSb steel pipe (ND steel pipe) is a sulfuric acid corrosion resistant steel. So far, 09CrCuSb steel is the most suitable steel for pitting corrosion resistance of sulfuric acid in China. The actual material of 09CrCuSb steel pipe (ND steel pipe) is 09CrCuSb, while ND steel is just a code name.

09CrCuSb steel pipe (ND steel pipe), selected in the GB150-1998 standard in 1997, is widely used in economizers, air preheaters, heat exchangers and evaporators that serve in high-sulfur flue gas. Due to the gradual increase in imports of high-sulfur crude oil in recent years, the existing ND materials can no longer meet the actual working conditions of most refineries, power plants and other enterprises. 09CrCuSb steel pipe (ND steel pipe) optimizes the material alloy ratio and adds other trace elements. The finished pipe has passed the third party inspection, and the uniform corrosion rate is more than twice that of the existing ND steel.