The high-pressure oil pipeline steel is commonly used for the pressurized hydraulic pipeline components in engineering machinery. Besides its high requirements for segregation, inclusions, and decarburization, it must also possess excellent pressure fatigue resistance, expansion, and flattening performance. For many years, this market has been dominated by foreign manufacturers.

Meishan Steel, in collaboration with industry chain users, has embarked on research and development efforts, successfully developing materials with a strength level of 490MPa. After multiple rounds of trial production and subsequent testing of welded pipes, including expansion, flattening, fatigue, etc., the materials finally meet the requirements of end users.

The high-pressure oil pipeline steel development team, in accordance with the industry's highest testing standards, has conducted composition and process design, delving into processing and testing processes on the user end. Whether it's online eddy current flaw detection, offline weld streamline and structure testing, or flattening tests and pressure tests, all are evaluated against the strictest standards for imported materials. During the internal process trial, the project team adjusted and optimized the control rolling and control cooling processes based on each round of small-scale trial results and the needs of coiling welding, continuously improving and enhancing the quality, ultimately controlling the material yield strength within a reasonable fluctuation range.

Meishan Steel's developed high-pressure oil pipeline steel possesses characteristics such as high purity, stable high performance, and high surface quality, completely fulfilling the role of import substitution. Overcoming initial challenges like the difficulty of batch furnace production for small orders, and getting closer to users by providing technical services, as the product continues to be put into use, the order volume has gradually increased.

Currently, Meishan Steel's high-pressure oil pipeline steel has obtained certification from multiple end-users and has the capability for continuous and stable batch supply.