1,30 inch seamless steel pipe 2,Outer diameter:10mm~900mm 3,thickness: ... 9001:2000; ISO/TS 169 Materials: 19mn5,c75,sae1050,30 etc.Products: 30 inch seamless steel pipe Delivery condition:cold drawn ,hot-rolled ... get win-win.At last,Happy every day for you! 30 inch seamless steel pipe