Thick-walled seamless steel pipes feature high static strength, impact toughness, and a high fatigue limit. They have good hardenability and exhibit high creep and tensile strength at high temperatures, with a long-term working temperature up to 500℃. During cold deformation, they have moderate plasticity and poor weldability. Worldwide, over 5,100 production plants, under more than 1,850 companies across 110+ countries, produce thick-walled seamless steel pipes, with over 260 factories in more than 170 companies across 44 countries producing oil pipes.