The equipments and pipes serving at high temperature and pressure and the presence of hydrogen in the petrochemical industry are usually made of Cr-Mo steels.Cr9Mo pipes replacing Cr5Mo are widely used in many parts of/with high-sulfur crude oil refining equipment to meet the more demanding high temperature anticorrosion and oxidation resistance requirements.The mechanical property,creep rupture property and high temperature oxidation-resistant property of domestic Cr9Mo steel are at the same level as the similar foreign products.Three years applications indicate that domestic Cr9Mo steel can fully meet the service requirements of petrochemical industries.Finally,this paper presents the material selection guidelines for the key oil refining devices processing of low sulfur/high acid crude oil.
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