... ASTM,DIN,JIS,BS,etc 4.Finish:Polished,stain Stainless Steel 90 Degree ElbowDescription MaterialStainless steel (304, 304L, 316, 316L, 321 ... "~8"ThicknessSch5S-Sch80S, STD, XS, XXSFinishmirror polishing , stain finishingMarkingstandard or as customer’s needInspectionin-house or the third ... Pipeline Materials to oil field and refinery as Steel Pipes,Pipe Fittings,Flange,Valves,Gasket,Petroleum Machinery, ...