Our products strictly comply with mainstream international standards, including China’s GB, the United States’ ASTM, and Japan’s JIS.


  Ningbo Yanchen Metal Manufacturing Co., Ltd. is a specialized manufacturer of stainless steel composite pipes, integrating research and development, production, processing, and sales. Located in Ningbo, an important port‑industrial city in China, we leverage the logistical advantages of a world‑class major port to provide global customers with high‑quality, cost‑effective bimetallic composite pipe solutions.

  We have nearly two decades of experience in manufacturing stainless steel clad welded pipes, backed by a dedicated technical team and a well-established management system. Our products are rigorously manufactured in compliance with leading international standards, including China’s GB, the United States’ ASTM, and Japan’s JIS, ensuring that every pipe leaving our facility meets the highest quality standards.

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Our products strictly comply with mainstream international standards, including China’s GB, the United States’ ASTM, and Japan’s JIS.

Our products strictly adhere to mainstream international standards, including China’s GB, the United States’ ASTM, and Japan’s JIS, ensuring that every pipe leaving our facility meets reliable quality standards.


Unveiling the Core Process of Stainless Steel Composite Tubes: Simultaneous Omnidirectional Extrusion Cladding

As application scenarios for stainless steel composite tubes continue to expand, market demands for enhanced protective performance and structural stability are steadily rising. The bimetallic composite structure—featuring a stainless steel outer layer and a galvanized inner layer—has emerged as an industry mainstream choice due to its dual corrosion resistance and high strength. The core competitiveness of this structure relies heavily on the technical support provided by the Simultaneous Omnidirectional Extrusion Cladding process.

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