GBT9711 L485/X70 PSL1 LSAW Pipeline is divided into seamless steel pipe and welded steel pipe, L485/X70 PSL1 LSAW Pipeline is mainly used for natural gas, petroleum, chemical, electric power, metallurgy thermodynamics field, water supply project, steam heating, hydropower station and long pipeline transportation project, its surface can be painted black varnish, antirust oil, hot dip galvanized, cold galvanized, FBE, 3PE, and so on.