GB/T 9711-2011 L690M/X100M PSL2 LSAW pipeline is use of cold-rolled process which is KUNFENG Steel main selling steel,L690M X100M PSL2 LSAW pipeline has good mechanical properties and chemical properties,it’s mainly used for conveying oil and gas pipelines, pressure fluid transport,its surface can be coated with oil, galvanized, 3PE anti-corrosion coating, black paint protection, according to customer requirements .