... Flange be according to ANSI, DIN, UNI, BS, JIS, KS standards. the materials are ASTM A105, ST37, Q235, ... -On, Welding-Neck, Blind Flanges; BS4504 / EN1092-1 / TABLE-E FLANGES: PN10, PN16, PN25, PN40 Flanges;JIS B2220 / KS B1503 FLANGES: 5K, 10K, 16K, ... 20K, 30K Flanges. Normal Size: DN15--DN2000mm ...