LSAW Steel Pipe

UOE and JCOE LSAW Pipe Specifications

The UOE method is used to produce dimensionally precise LSAW pipes. It begins with preparing high-quality steel plates, which are first pre-bent at the edges using a dedicated press. The plates are then shaped into a ‘U’ form through a U-press or cold rolling, followed by an O-forming stage where the open ends are curved inward to create a circular tube. The O-shaped plates are then longitudinally welded using submerged arc welding, creating a seamless and high-quality joint. Finally, the pipes are expanded using hydraulic or mechanical methods to achieve the desired diameter and enhance strength.

The JCOE manufacturing process uses precise multi-step forming technology. First, the steel plate is punched on a JCO forming machine, half of the steel plate is pressed into a “J” shape, and the other half is pressed into a “C” shape. The steel plate is then pressed from the center to form an open “O” shaped pipe blank. Next, the edges are welded longitudinally using submerged arc welding to ensure smooth and durable seams. The pipe is then expanded using high-pressure cylinders to achieve precise dimensions and enhance structural integrity. JCOE pipes are of better quality, easier to process and easier to transport than standard pipes.

LSAW pipe is widely used in oil and gas pipelines. They need pipes with very large diameters, thick walls, and high strength. This is to move hydrocarbons over long distances. In the meantime, LSAW pipe is highly recommended for many uses. These include: weight bearing piles, combination wall piles, water treatment, the thermal sector, bridge construction, and others. Specific applications in the following industries: