Introduction Of Pipeline Steel Plate Production Technology

Although the production of high strength pipeline pipe steel plate can use control rolling and instant cooling technology, but in order to ensure that toughness and weldability, in order to obtain high strength, short cooling time will therefore play a very important role. In 1980, steel mills in China for the first time rapid cooling technology was applied to heavy plate production, in 1998 a new flow control technology was developed and adopted to realize maximum theoretical cooling speed "Super - OLAC" device. Rapid cooling of the cooling speed can not only improve strength by strengthening phase transition, but also help the organization's refinement, improve the toughness and decrease alloying elements at the same time. Apply the most advanced rapid cooling device of TMCP technology has been able to produce all kinds of high strength pipeline pipe, such as acid-resisting gas pipe and X100 pipeline, etc. As mentioned above, pipeline pipe steel plate products are not only required to have good strength and toughness, but also for the acid gas corrosion resistance and high deformability and so on, so material must be carried out in accordance with the final use purposes. In order to improve the added value and properties of high strength pipeline pipe, JFE steel company in western Japan steel (fushan area) installed "HOP" on-line heat treatment equipment.
HOP is a kind of electromagnetic induction heating equipment, which is installed on super fast cooling device – OLAC, near the back of the hot leveller. By putting a HOP and Super - OLAC combination, precise and advanced control can be realized in the working process. Using ordinary TMCP process, air cooling process of steel plate is taken instantly after rolling, and HOP technology is in rapid cooling after using induction heating for rapid heating. Therefore, phase change can be under control and at the same time make carbide refining precipitation, organizations become homogeneous or heterogeneous organization, this way to gain steel characteristics that can’t be achieved using only ordinary fast cooling.
HOP production application of the typical steel pipe products covers high strength and acid gas pipeline tube, high deformability pipeline tube, casing/well high strength steel tube, etc. With the thickness direction and steel plate uniform internal material, small and good shape steel material deviation can be achieved.