LSAW pipe

Generally speaking, LSAW pipe is made of steel plate through different forming processes, such as double-sided submerged arc welding and expanding after welding. The forming methods of LSAW pipe include uo (UOE), Rb (RBE), JCO (JCOE), etc.

The forming process of UOE longitudinal submerged arc welded pipe mainly includes three forming processes: steel plate pre bending, u forming and O forming. Each process uses a special forming press to complete the three processes of steel plate edge pre bending, u forming and O forming in order to deform the steel plate into a circular tube. The forming process of JCOE longitudinal submerged arc welded pipe: in jc0 After repeated stamping on the forming machine, the first half of the steel plate is pressed into a J shape, and then the other half of the steel plate is pressed into a J shape to form a C shape.

JCO forming is progressive pressure forming, which changes the forming process of steel pipe from two steps of UO forming to multi steps. In the forming process, the steel plate has uniform deformation, small residual stress and no scratch on the surface. The processed steel pipe has great flexibility in the size range of diameter and wall thickness. It can produce large quantities of products and small quantities of products, as well as large caliber and high-quality products It can also produce small diameter and large wall steel pipes, especially in the production of high-quality thick wall pipes, especially in the production of medium and small diameter thick wall pipes. It has incomparable advantages over other processes, and can meet more requirements of users for steel pipe specifications. Uo molding adopts u and O two-step pressure forming, which is characterized by large capacity and high output. Generally, the annual output can reach 30-30% 1 million tons, suitable for single specification mass production.