Our History

The company added an industrial X-ray inspection project and obtained an invention patent for a “Heavy Plate Integrated Pre-bending Forming Device” in 2024, as well as a utility model patent for a “Conductive Grounding Device for Longitudinal Seam Welding” in 2025. As of 2025, the company holds 11 patents and 6 software copyrights, employs 124 insured staff members, with total investment exceeding RMB 1 billion and total plant area exceeding 1,000 mu.

Construction officially commenced on the laser welding production line project, covering 50 mu with a total investment of RMB 300 million. Equipment commissioning and trial operation began in 2023.

In cooperation with Harbin Institute of Technology Welding Technology Co., Ltd., the company launched the R&D program for a large-diameter thick-wall steel pipe laser welding system, capable of welding steel plates with thicknesses ranging from 10 mm to 15 mm.

Acquired Cangzhou Longhong Steel Pipe Co., Ltd. for seamless pipe business expansion, and participated in the construction of Plant No.3 (Zhihang Steel Pipe Longma Branch). FFX high-frequency forming technology was introduced during this period. The registered capital was gradually increased to RMB 176 million, officially confirmed in 2018.

Obtained API 5L certification issued by the American Petroleum Institute (API). Products were subsequently supplied to major national projects such as the West–East Gas Pipeline Project and the South-to-North Water Diversion Project.

Invested RMB 310 million to expand Plant No.2, covering 500 mu. Through cooperation with a German partner, the company introduced German JCOE forming equipment and independently developed several double-sided submerged arc welded pipe production lines, increasing annual production capacity to over 600,000 tons.

Certified to ISO 9000 Quality Management System.

The company was established with an initial investment of RMB 250 million for Plant No.1, covering an area of 200 mu, mainly engaged in the production of longitudinal submerged arc welded (LSAW) pipes. In the same year, the company completed industrial and commercial registration as a joint-stock enterprise (non-listed company).