Features 1) Stainless steel and Carbon steel flange. 2) Standard : ASME,ANSI,AWWA,JIS,DIN,API,BS etc 3) Size: as customer requirements 4) Material : 316L, 316Ti, 304L, 321, 321H, Rst37.2, C22.8 etc. 5) Special design available 6) Certificate : ISO 9001,14001, KEPIC, etc