ERW Production Improved

The quality of the raw materials used in ERW production has been significantly improved. Low-carbon, low-phosphorus, low-sulfur steel parts design, microalloying; converter smelting, ladle refining, vacuum degassing, continuous casting and other new technologies in the smelting process. Controlled rolling and controlled cooling are used in the rolling process The technology has greatly improved the appearance size, appearance quality and physical and chemical properties of the hot rolling mill. Rolled steel strips for large and medium-sized ERW steel pipes. The pipeline steel produced by Baosteel Co., Ltd., which represents the highest level of hot-rolled steel strip in China, has reached the requirements of the API 5L standard of the American Petroleum Institute and is at the international leading level.