Development of Φ1 220 mm×22 mm SAW Straight Weld Pipe in K60-2 Steel Grade

At present the designs of some domestic pipeline systems are overcritical, which has led to the quality surplus of home-made linepipes and unnecessary economic losses, and thus weakened the competitiveness of such products in the global market.Addressing this problem, and based on the development process of the Φ1 220 mm × 22 mm SAW straight weld pipe in K60-2 steel grade especially developed by Huabei Petroleum Steel Pipe Plant for the "East Siberia-Pacific Pipeline Project" of Russia, the co-authors discuss the relation-ship between proper chemical compositions, structures and property designs of steel sheets for linepipe-making and their economic effectiveness.It is emphasized that the designs of chemical composition, structure and properties of steel sheet as stock of linepipe should be made reasonably, and produce most economic linepipe-purpose steel sheets under the requisite that relevant application requirements are satisfied in order to enhance competitiveness of home-made SAW straight weld pipes.