What is JCOE LSAW Pipe Mill Making Production Line


In the world of modern industrial manufacturing, pipelines are vital components that facilitate the transportation of fluids, such as oil, gas, and water, across vast distances. To meet the ever-increasing demand for large-diameter and high-quality steel pipes, the JCOE LSAW Pipe Mill Making Production Line has emerged as a revolutionary solution. This advanced manufacturing process ensures the efficient and precise production of Longitudinally Submerged Arc Welded (LSAW) pipes, which find extensive use in various sectors, including oil and gas transmission, infrastructure development, and construction projects.

Understanding JCOE LSAW Pipe Mill Making Production Line

The acronym “JCOE” stands for “J-ing, C-ing, O-ing, and E-ing,” which represent the different stages in the pipe forming process. The JCOE Pipe Making Production Line is an integrated manufacturing facility that combines cutting-edge technologies, precision machinery, and skilled craftsmanship to create large-diameter, thick-walled steel pipes with exceptional strength and reliability.

1. J-Forming

The JCOE process begins with “J-Forming,” where a flat steel plate is bent into the shape of a “J” using hydraulic presses and bending rolls. This initial shaping is crucial to establish the foundation for subsequent forming stages.

2. C-Forming

After the J-Forming, the pipe-to-be undergoes “C-Forming,” during which it is further shaped into the letter “C.” This step prepares the plate for the next phase of the JCOE process.

3. O-Forming

The next critical stage is “O-Forming,” where the C-shaped plate is expanded and bent into a circular shape, resembling the letter “O.” This step determines the final outside diameter (OD) of the pipe.

4. E-Forming

The last stage is “E-Forming,” where the ends of the pipe are aligned and prepared for welding. The plate is carefully shaped into the letter “E” to ensure proper fitting during welding.

5. Welding

Once the JCOE forming process is complete, the pipe undergoes Longitudinal Submerged Arc Welding (LSAW). The pipe is welded longitudinally using a Submerged Arc Welding (SAW) process, resulting in strong and continuous welds along the length of the pipe.

6. Expanding and Straightening

After welding, the pipe is passed through an expanding machine to increase its diameter and wall thickness, ensuring a seamless and high-quality product. Additionally, the pipe may go through a straightening machine to achieve the required dimensional tolerances and straightness.


The JCOE LSAW Pipe Mill Making Production Line has revolutionized the steel pipe manufacturing industry by enabling the efficient and precise production of large-diameter, thick-walled pipes. This advanced process incorporates the JCOE forming stages of J-Forming, C-Forming, O-Forming, and E-Forming, along with Longitudinal Submerged Arc Welding (LSAW), expanding, and straightening. The result is a range of high-quality LSAW pipes that serve as critical components in various industries, meeting the demands of modern infrastructure and energy transportation projects. As the demand for pipelines continues to rise, the JCOE Pipe Making Production Line stands as a testament to human ingenuity and technological advancement, ensuring the seamless flow of resources across the globe.