In petroleum and petrochemicals, stainless steel pipes are mainly used in pipeline transportation systems, including high-pressure furnace pipes, piping, petroleum cracking pipes, fluid transportation pipes, heat exchange pipes, etc. Analysis of the requirements for stainless steel in the petrochemical industry include corrosion resistance, including chloride, sulfide and other salt corrosion; high temperature resistance and low temperature resistance, etc. Stainless steel used for crude oil exploration and development requires resistance to carbon dioxide and hydrogen sulfide corrosion. At present, my country's crude oil exploration and development mainly use 3Cr, 9Cr, 13Cr, super 13Cr and stainless steel thick-walled non-magnetic drill jacks and drill pipes containing more than Cr22. In addition, the potential market for the petrochemical industry is large-diameter petroleum cracking furnaces Due to their special requirements for heat resistance and corrosion resistance and the inconvenience of equipment installation and maintenance, pipes and low-temperature conveying pipes require a long service life of the equipment, and the mechanical properties and usage performance need to be controlled through material composition.
In order to adapt to the processing of low-quality crude oil and meet environmental protection requirements, domestic refining and chemical companies continue to optimize the processing structure of refining units and adjust the product structure. Among them, high-pressure hydrogenation units such as hydrocracking and hydrotreating have developed rapidly in recent years, and the processing capacity of the units It is also constantly improving.
