Ultra-Large 4220 Spiral Pipe Mill Completes Commissioning and Begins Pipe Production
14 Nov,2025
The Jiangsu ultra-large-diameter 4220 spiral welded pipe mill has successfully completed commissioning and is now producing pipes. This machine employs a front-swing intermittent production method and represents a fully integrated, automated system combining mechanical, electrical, and hydraulic controls. It is capable of manufacturing extra-large-diameter, high-precision spiral welded pipes—products that find extensive applications in critical sectors such as oil and gas transportation, urban pipeline networks, and bridge construction. The successful deployment of this advanced equipment holds significant importance for enhancing the safety and durability of the nation's vital infrastructure.
Equipment Specifications:
Plate width: 1000–2000 mm
Pipe diameter: Φ820 – Φ4220 mm
Wall thickness: 8 – 28 mm
Pipe length: 6–13 m
During the debugging process, the technical team overcame several challenging technical hurdles. Through precise process control and rigorous quality inspections, they ensured the smooth production of the first welded pipe, with all performance indicators meeting or exceeding industry standards. This successful milestone not only lays a solid foundation for subsequent mass production but also further strengthens Jiangsu Province's leading position in the field of spiral welded pipe manufacturing, contributing significantly to the high-quality development of China's pipe-making industry.
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