Pipe & Tube SystemChina ASTM API 5L X42-X80 Oil and Gas Carbon Seamless Steel Pipe/20-30 Inch Seamless Steel Pipe Tube, Find details about China Seamless Steel Tube, Seamless Tube from ASTM API 5L X42-X80 Oil and Gas Carbon Seamless Steel Pipe/20-30 Inch Seamless Steel Pipe Tube