GBT9711 L450/X65 PSL1 LSAW Pipeline is mainly used in natural gas, petroleum, chemical industry, electric power, water supply project and long-distance pipeline project.L450/X65 PSL1 LSAW Pipeline's surface can be painted black paint, varnish, rust-proof oil, hot dip galvanized, cold galvanized, FBE, 3PE and so on.