Latest News

• 04-03

  2026

  Cold drawn seamless steel pipe size chart

  Cold drawn seamless steel pipes are widely used in applications where high dimensional accuracy, smooth surface finish, and tight tolerances are required. Compared with hot rolled pipes, cold drawn tubes offer better precision and consistency, making them ideal for hydraulic systems, automotive parts, and precision engineering. This guide provides an overview of size ranges, application categories, selection principles, and standards of cold drawn seamless steel pipe.
• 03-31

  2026

  How to inspect the quality of alloy steel pipes?

  Alloy steel pipe quality is determined through chemical analysis, mechanical testing, and structural integrity inspection. These methods ensure the pipe meets requirements for strength, durability, and safety in industrial applications. This article will briefly introduce how to inspect the quality of alloy steel pipes.
• 03-26

  2026

  What are the analytical methods for surface roughness of precision steel pipes?

  Surface roughness is a critical quality indicator in precision steel pipe manufacturing. The two most commonly used parameters—Ra (average roughness) and Rz (maximum roughness height)—are used to evaluate the microscopic surface profile of the pipe. Understanding their differences is essential for process control, quality inspection, and application matching.
• 03-24

  2026

  Why do seamless steel pipes fail hydrostatic tests?

  Seamless steel pipes fail hydrostatic tests mainly due to material defects, manufacturing issues, dimensional inconsistencies, or improper testing procedures. Failures typically appear as leakage or bursting under pressure. Controlling raw material quality, optimizing production processes, and standardizing testing operations are key to improving hydrostatic test pass rates.