... /2" -80" DN15 to DN2000 Material: carbon steel, stainless steel FORGED FLANGE Standards: ANSI(ASME), AWWA, DIN, EN1092, GOST, JIS, BS ... DN2000sealing surface type: FF(flat face), RF(raised face), RTJ( ring type joint)Coating: anti-rust oil, black paint, transparent yellow ...