Application fields of special alloys in the petroleum industry:
Petroleum exploration and development is a multidisciplinary, highly technology and capital intensive industry that requires the consumption of a large amount of metallurgical materials and products with different properties and uses. With the development of ultra-deep, ultra-inclined oil and gas wells and oil and gas fields containing H2S , CO2, Cl-, etc., the application of stainless steel with anti-corrosion performance requirements is increasing.
The development of the petrochemical industry and the renewal of petrochemical equipment have put forward higher requirements on the quality and performance of stainless steel. Stainless steel is required to be resistant to corrosion, high temperature and low temperature. The conditions are not stricter but more stringent. The high-pressure, toxic industry is different from other industries. The consequences of mixing materials are not obvious. Once the quality of stainless steel in the petrochemical industry is not guaranteed, the consequences will be unimaginable. Therefore, domestic stainless steel companies, especially steel pipe companies, should increase the technical content Added value, occupy the high-end product market.
The petrochemical industry's requirements for stainless steel mainly include corrosion resistance, including chloride, sulfide and other salt corrosion; high temperature resistance and low temperature resistance. The stainless steel used for crude oil exploration and development requires resistance to carbon dioxide and hydrogen sulfide corrosion. At present, China's crude oil exploration and development are mainly used in 3Cr, 9Cr, 13Cr, super 13Cr and stainless steel thick-walled non-magnetic drill rods and drill pipes containing Cr22 or more.
The potential market of the petrochemical industry is large-diameter oil cracking furnace pipes and low-temperature conveying pipes. Due to their special heat and corrosion resistance requirements and inconvenient equipment installation and maintenance, the equipment has a long service life cycle and requires material composition control and special heat treatment Optimize the mechanical properties and serviceability of pipes. Another potential market is special steel pipes for the fertilizer industry (urea, phosphate fertilizer), the main steel types are 316Lmod and 2re69.
Commonly used in reactors in petrochemical equipment, oil well pipes, polished rods in corrosive oil wells, spiral pipes in petrochemical furnaces, and parts on oil and gas drilling equipment.
Special alloys commonly used in the petroleum industry are:
· Stainless steel: 316LN, 1.4529, 1.4539, 254SMO, 654SMO and other
· High-temperature alloys: GH4049
· Nickel-based alloy: Alloy 31, Alloy 926, Incoloy 925, Inconel 617, Nickel 201 and other
· Corrosion-resistant alloys: NS112, NS322, NS333, NS334