Duplex stainless steel has a history of nearly 80 years. Composed of approximately 50% ferrite and 50% austenite, it offers excellent corrosion resistance, high strength, and ease of manufacturing and processing, making it suitable for various industries, including oil and gas, marine engineering, and the chemical industry. Driven by its superior performance in harsh environments, the demand for duplex stainless steel pipes has been steadily increasing in recent years. Below is a list of Chinese manufacturers of duplex stainless steel pipes.
- Jiuli is a listed company and a leading enterprise in the duplex stainless steel pipe industry. The company possesses advanced seamless and welded pipe production lines and has established a comprehensive R&D and certification system.
- Jiuli holds numerous core patents that improve product strength, toughness, and corrosion resistance, and is particularly renowned for its large-diameter, thick-walled duplex stainless steel pipes used in low-temperature marine environments.
- is a professional manufacturer of special stainless steel pipes, with strong competitiveness in the field of duplex stainless steel welded and seamless pipes. The company has a complete industrial chain, enabling full control from raw materials to finished pipes.
- TORICH strictly implements a quality management system, ensuring product traceability, and holds multiple international certifications such as ISO 9001, PED, TÜV, and BV, complying with global standards. With a wide range of sizes, strong supply capacity, and an independent R&D engineering team, TORICH provides customized one-stop duplex stainless steel pipe solutions for demanding applications in the oil and gas, chemical, and marine engineering industries.
Taiyuan Iron & Steel is one of the earliest enterprises in China to produce duplex stainless steel. The company has a complete industrial chain from steelmaking to pipe manufacturing and has developed ultra-large-diameter pipe blanks, filling a gap in the domestic market. Its products are widely used in petrochemical and offshore platform projects.
Wujin Stainless Steel possesses strong technical capabilities in high-end fields such as power plant boilers and nuclear power. The company is equipped with high-speed cold rolling mills and advanced heat treatment furnaces, ensuring high dimensional accuracy and enabling the production of large-diameter duplex stainless steel seamless pipes.
Yelian focuses on duplex stainless steel welded pipes, possessing automated production lines and online bright annealing technology. The company specializes in producing large-diameter welded pipes with stable performance, particularly suitable for the nuclear power industry.
Jinbaoli has an annual production capacity of approximately 50,000 tons, focusing on high-strength duplex stainless steel seamless pipes with a yield strength exceeding 550 MPa and a PREN value exceeding 40. Its products are used in the aerospace, nuclear power, and petrochemical industries.
CITIC Pacific benefits from advanced smelting purity control and heat treatment technologies, resulting in highly stable product quality. Its duplex stainless steel pipes are mainly used in harsh environments such as oil and gas exploration and marine engineering.
Qingshan Steel Pipe specializes in the production of stainless steel seamless pipes and possesses a complete industrial chain. The company is ISO 9001 and ISO 14001 certified, offers a variety of duplex stainless steel grades, and boasts strong technical capabilities in welding and heat treatment.
Yongxing Special Steel excels in the production of thin-walled duplex stainless steel pipes, utilizing advanced cold rolling and cold drawing processes. Its products feature high precision and excellent surface quality, and are widely used in the chemical and food processing industries.
Yongxin Stainless Steel is a major welded pipe production base in East China. With precise process control and a comprehensive production management system, the company provides stable and reliable duplex stainless steel welded pipe products.