1.Steel flange 2. EN1092-1 type 11/B;PN 10/16;DN15---DN400. 3. 4 holes, 8 holes, 12 holes or 16 holes. 4.ISO 9001 approved. Steel flangeEN1092-1 type 11/BPN 10/16DN15----DN4004 holes, 8holes, 12 holes or 16 holesMaterial Specs: Q235B, 20Mn A105, S235JRG2, 304, 316Standard available: EN1092-1, ANSIB16.5, DIN, GOST, JIS, UNI or BS10. Steel Flange EN1092-1