Characteristics of Large Inclusions in High Grade Pipeline Steel

摘要

Good internal quality of steel pipes is a basic guarantee for the safe and efficient operation of pipeline system.While presence of large inclusions has adverse effect on the mechanical properties,weldability and corrosion resistance of the steel pipes,and then it would bring huge risk to the safe operation of oil and gas transmission pipeline.In order to reduce the risk to a minimum extent,it is quite necessary to analysis and study the characteristics of large inclusions in high grade pipeline steel,and then it would provide evidence for the formulation of level-determination standard of large inclusions during steel pipe acceptance.Optimized production technology such as electromagnetic stirring is put forward accordingly to prevent the occurrence of large inclusions in pipeline steel.