GB/T9711-2011 L450Q/X65Q PSL2 LSAW pipeline is KUNFENG Steel main production of steel, we can provide pipeline with diameter 219 mm to 3500 mm, wall thickness 5-30 mm,L450Q X65Q PSL2 LSAW pipeline is mainly used in fluid pipe, power plant, structural pipe, high and low pressure boiler pipe, oil exploitation steel pipe, pipe, scaffold tube pharmaceutical and Ship construction,its surface can be painted rust-proof black paint or according to customer requirements.