... : 1/2" - 72"3) Material: Carbon Steel, Stainless Steel, Alloy Steel, Duplexsuper duplex stainless steelASTM: Carbon Steel: ASTM A234 WPB, WPC; ASTM A420 WPL9 ... , SUS321Alloy Steel: PA22, PA23,PA24, PA25, PL3804) Standards: ANSI B16.9, B16.28, DIN2605,DIN2609, DIN2615, DIN2616, DIN2617, JIS2311, JIS 2312, JIS2313 ...