Stainless steel has good characteristics of high-temperature resistance, low-temperature resistance, and corrosion resistance of various media, and has been widely used in chemical equipment. It is the first choice among corrosion-resistant materials. In some corrosive media, stainless steel has superior corrosion resistance to carbon steel and its service life is several times or even dozens of times longer than carbon steel. Although the one-time investment in equipment is high, the overall savings can be substantial. This is why stainless steel materials occupy a very important position in chemical production.
The Cr content of austenitic stainless steel is between 17% and 20%, the Ni content is between 8% and 16%, and the C content is generally lower than 0.12%. The austenite structure is obtained. Austenitic stainless steel has excellent corrosion resistance, plasticity, toughness, formability, weldability and low temperature performance compared to other stainless steels.
In the petroleum and petrochemical industry, stainless steel pipes are mainly used in pipeline transportation systems, including high-pressure furnace pipes, piping, oil cracking pipes, fluid transportation pipes, heat exchange pipes, etc. Stainless steel is required to perform well in wet and acid service conditions.