Welded Tee Size: 10"-48" Thickness: SGP, STD, SCH, XXS Standard: ANSI B16.9/16.28, ASTM A53/A106, API 5L, ASME B36.10M-- 1996, DIN2605/2615/2616, JIS P2311/2312 Material: Carbon steel, alloy steel Surface treatment: Transparent oil, rust-proof black oil Seamless Tee Size: 1/2"-20" Thickness: SGP, STD, SCH, XXS Standard: ANSI B16.9/16.28, ASTM A53/A106, API 5L, ASME B36.10M-- 1996, DIN2605/2615/2616, JIS P2311/2312 Surface treatment: Transparent oil, rust-proof black oil Material: Carbon steel, alloy steel Surface treatment: Transparent oil, rust-proof black oil