... .Standard: ASME, ANSI, JIS, DIN,etc 2.Material: Q235,20#,alloy steel,etc 3.Carbon Steel Tee Size:1/2"-48 ... process are made under the ISO9001:2000 strictly.Pipe fittingsFlange,Elbows, Tees, Reduces,etc MaterialMaterial: Q235,20#,alloy steel,Stainless steel,etcStandardASTM / JIS ...