1. flange manufacture with many years of exporting 2. din standard flange 3. ISO9001:2000, ISO14004:2004, PED, AA+credit ... , THD, LWN, LJ, RED and SBLStandard: ANSI,AWWA, API, MSS, DIN, BS, JIS, UNI, KS and EN1092.Material: Carbon Steel - A105 ... : Class 150, 300, 600, 900, 1500 and2500.PN 6, PN 10, PN 16, PN 25, PN 40 and PN 64.5K, 10K, 16K, and 20K.Treatment of ...