【Major Chemical Equipment Innovations】388 — From 2019, Jiangyin Xingcheng Special Steel and the Steel Research Institute developed 38mmX65MS pipeline steel resistant to wet hydrogen sulfide
Thread Content
This post was last edited by FishSwimmingInTheDesert on 2022-6-24 at 07:43. The project titled “Innovation in Key Technologies and Industrialization for the Production of High-Quality Pipeline Steel Resistant to Wet Hydrogen Sulfide Corrosion”, jointly developed by Jiangyin Xingcheng Special Steel Co., Ltd. and Central Research Institute of Iron and Steel, recently won the Second Prize of the 2019 Metallurgical Science and Technology Award.
During oil and gas transportation, hydrogen-induced cracking and stress corrosion caused by wet hydrogen sulfide corrosion are the main reasons for pipeline failure. In recent years, China has made significant progress in pipeline steel manufacturing technology; however, there is still a considerable gap compared to advanced countries in terms of the production technology and application of high-quality pipeline steel resistant to wet hydrogen sulfide corrosion. In response to this situation, the project team adopted an approach that combined fundamental research with the development of key technologies and their promotion for application, in order to tackle the technical challenges related to high-quality pipeline steel resistant to hydrogen sulfide. This led to an upgrade in both the products and the manufacturing technologies.
This project falls within the field of research, development, and application of new products and processes in steel metallurgy. It focuses on upgrading the quality of high-grade pipeline steel. The main innovations of this project are as follows: (1) It introduces in China the \"BOF+RH+LF+RH\" process for producing highly pure steel, overcoming the technical challenges associated with the production of ultra-low carbon, highly pure steel. This approach results in an integrated control technology for steel purity that is leading in China and advanced on the international level, enabling stable control of S levels at ≤0.0008%, ≤0.0010%, ≤0.0020%, and ≤0.0001%; meanwhile, the level of inclusions A+B+C+D is kept at ≤2.0. (2) Nationally first-developed manufacturing and rolling control technology for 450 mm thick highly homogeneous continuous cast billets suitable for high-quality pipeline steel. The manufacturing and rolling technologies for extra-thick continuous cast slabs have been overcome; control techniques such as liquid core pressing, electromagnetic stirring, and casting at low superheat specifically designed for 450mm slabs have been developed. The quality of these slabs achieves a level where central segregation is equal to or better than CO.5 grade, and central porosity is equal to or better than 0.5 grade. Technologies such as differential temperature high-permeability rolling, austenite super-refinement control, precise regulation of MA components, and banded structure have been developed, effectively improving the fracture toughness and acid resistance of thick steel plates.
(3) The manufacturing technology for pipeline steel with large wall thickness was overcome, and the industrial application of 38mm X65MS wet hydrogen sulfide-resistant pipeline steel was achieved for the first time. (4) Product upgrading was achieved through integrated innovation, resulting in a significant improvement in the acid resistance of the X60-X90 series of pipeline steel products. The X60-X90 series of pipeline steel products manufactured by Xingcheng Special Steel can all pass the acid resistance test using the NACE0284-A solution.
This project has been granted 15 invention patents and produced 21 papers. The metallurgical quality of these products is at an internationally advanced level, and they are used on a large scale by Welspun – the world’s leading steel pipe manufacturer; Xingcheng Special Steel is the only supplier in China capable of providing hydrogen sulfide-resistant steel plates. Over the past three years, a total of 98,200 tons of such products have been produced, generating an output value of 575 million yuan and foreign exchange earnings of 388 million yuan, thereby delivering significant economic benefits. At the same time, this project represents the integration and industrialization of innovative technologies for high-quality steel plates; it drives technological progress in high-quality pipeline steel in China and holds great significance for advancing the manufacturing technology of high-end medium and thick plates in the country.
Cheer for Made in China, give support to chemical equipment!
Learn together*, improve together! Enjoy communicating, enjoy sharing!